Just as a person thinks—”I will meditate this morning”—this is resolve. The next moment they think—”But will there be time?”, “Should I eat first?”—this is alternative. The mind thus races from one thought to another, never remaining still. This movement and oscillation is the very nature (essence) of mind.
Intellect, conversely, arrives at decisions—where mind questions, intellect answers. Thus Vedanta declares—mind is of the nature of resolve-and-alternative, intellect is of the nature of decision. Mind is fluid like water, intellect steady like stone. Mind rushes toward possibilities, intellect brings stability there.
Mind is that inner current where consciousness manifests as various thoughts, desires and doubts; while intellect is that power which brings stability to that current. The Self itself is the witness of all these activities—it neither resolves nor wavers; but it is in its light that both mind and intellect become active.
“Intellect is of the nature of decision”—this statement is a particular definition from Vedanta’s subtle psychological analysis, meaning—decision-making is the very nature of intellect. That is, where mind wavers in thought and doubt, intellect reaches firm decision—this decision-making is intellect’s inherent nature or essence.
Vedanta states—the human psyche’s inner instrument is divided into four parts: mind, intellect, memory and ego. Mind is of the nature of resolve-and-alternative—that is, its function is to desire, think, doubt, consider alternatives. And intellect is of the nature of decision—that is, its function is to decide clearly: “This is true”, “This must be done”, “This is wrong”—this discriminative capacity is intellect’s nature.
An example clarifies the matter. If someone thinks—”Should I go out today or not?”—this question or doubt is mind’s work. After some consideration, if they decide firmly—”No, I won’t go today”—this final decision is intellect’s work.
The Katha Upanishad (1.3.3-1.3.9) explains—”Know intellect to be the charioteer, and mind the reins.” That is, intellect is the chariot-driver, mind the reins. Just as the driver decides which path the chariot will take, so intellect decides which direction mind and senses should be guided.
Intellect makes this decision through the power of “discrimination” (discernment). It gathers information from mind and senses, takes memory from consciousness-store, receives “I”-sense from ego, then discriminates to determine differences between truth-falsehood, right-wrong, eternal-temporary. This discriminative power is called discriminating intellect.
When intellect is impure, it makes wrong decisions under ego’s influence; but when intellect is pure and clear, it turns toward the Self—then it knows, “I am not the body, I am consciousness.” The Gita (18.30) calls this state—”that which discriminates between righteousness and unrighteousness, what should and should not be done”—that intellect which can discriminate between duty and non-duty, action and inaction, is pure intellect.
In Vedanta, discrimination (viveka) and intellect (buddhi) are closely related yet not identical. Both function at subtle levels of consciousness, but their roles and natures differ.
Intellect is an organ of the inner instrument, whose function is to determine or decide. Together with mind, memory and ego, it reflects the Self’s knowledge. Intellect receives information, analyzes, and reaches a settled opinion—”This is right”, “This is wrong”, “This should be done.” Hence intellect is called decision-natured. It is part of mental activity, whose scope extends from daily judgments to spiritual inquiry.
On the other hand, discrimination is intellect’s purified form, or we might say, intellect’s wisdom-filled culmination. Discrimination means “separative knowledge”—that which can distinguish between truth and falsehood, eternal and temporal, Self and not-Self.
Etymologically, “viveka” comes from the Sanskrit root vic—”vi + vic”—meaning “that which can understand separately.” So discrimination is that illumined intellectual power which establishes discriminative knowledge amidst all confusion.
The prefix “vi” means “separately”, “specially” or “with distinction”, while the root “vic” means “to judge”, “to investigate”, “to separate.” Thus “vi + vic” forming viveka literally means—”that which judges separately” or “that which knows how to discriminate”—the power to understand differences between true and false, permanent and impermanent, Self and not-Self.
Just as intellect decides—”I’ll do this”, “I’ll leave that”—discrimination says—”This is not the Self”, “This is momentary”, “This alone is true.” Intellect works in the practical sphere, discrimination works in establishing being-knowledge or determining truth-falsehood.
A simple example: When you say, “It would be good to do this work now”—this is intellect’s decision. When you realize, “I am not the body, I am consciousness”—this is discrimination’s knowledge.
Intellect becomes truly effective only when purified by discrimination. Impure intellect makes wrong decisions under ego and sensory influence; but pure intellect—known as discriminating intellect—gives birth to Self-oriented wisdom.
The Gita (18.30) beautifully explains this difference—”That intellect which rightly understands righteousness and unrighteousness, what should and should not be done, is sattvic.” That is, intellect which can distinguish between duty and non-duty, right action and wrong action, is sattvic or discrimination-endowed intellect.
Intellect is the instrument, discrimination is that instrument’s light. Intellect reaches decisions, discrimination identifies truth. Intellect may be pure or impure; discrimination is always an expression of purity. When intellect becomes discrimination-filled, then knowledge dawns, and that knowledge is liberation’s gateway—where the distinction between Self and not-Self completely dissolves.
In Vedanta, intellect is that subtle inner instrument which, together with mind, memory and ego, reflects knowledge. But this intellect is not always equally clear—when influenced by ignorance, desire, anger, hatred, greed etc., it becomes tainted; when those influences are removed, it becomes pure, brilliant and truth-devoted. These two states are called impure intellect and pure intellect.
Impure intellect is that intellect covered by desire and ego—where decisions are based on personal interest, fear, greed, or attachment. In this state intellect cannot judge correctly, because it is unclear, like a mirror covered in mist. For instance, someone knows wrongdoing is wrong, yet makes wrong decisions in greed or anger—this is impure intellect’s work. The Gita (2.44) states—”Those attached to enjoyment and power, whose minds are carried away by that, cannot achieve resolute intellect in meditation”—that is, those attached to pleasure and wealth cannot stabilize their intellect. This intellect is impure because its judgment is distorted by desire.
Impure intellect reflects the Self’s light but does so in distorted fashion, like sunlight on agitated water. Truth and falsehood become mixed—one thinks, “I am the body”, “I am the doer”, “I am happy or sad.” In this state intellect remains bound to worldly matters, never turning toward the Self.
Pure intellect, on the other hand, is that state when intellect is free from impurity, peaceful, clear and truth-perceiving. It has no desire or fear, no attachment to results, only single-minded yearning for truth. Pure intellect keeps no shadow of ego in its decisions—it knows, “I am not the doer, Brahman alone is the doer.”
The Gita (18.30) speaks of pure intellect—”That intellect which rightly discriminates between righteousness and unrighteousness, what should and should not be done, is sattvic”—that is, intellect which can correctly distinguish duty-non-duty, right action-wrong action, is sattvic or pure intellect. Again (18.31) states that when intellect is confused between righteousness and unrighteousness, that is rajasic or tamasic intellect—that is, impure intellect.
Pure intellect is steady, dispassionate, peaceful and Self-oriented; impure intellect is restless, attached and externally-oriented. Pure intellect leads toward God, impure intellect pulls toward the world. Pure intellect gives birth to knowledge, impure intellect thickens maya’s web.
Therefore, pure intellect means that inner instrument which, freed from desire, anger and ego, can see truth as it is. It is like a mirror where the Self’s reflection is undistorted—where consciousness is clearly reflected. Impure intellect is that mirror where dust has accumulated; so though light reflects, it is tainted, distorted, unclear.
The path to achieving pure intellect is yoga and practice—meditation, self-discipline, selfless action and devotion. When mind is peaceful, intellect clear, and heart humble, then the Self’s light reflects clearly in intellect—and that reflection is true knowledge, which opens liberation’s door.
Thus, “intellect is of the nature of decision” means—intellect’s nature is to reach decisions, to bring stability. Mind wavers, intellect stabilizes; mind sees possibilities, intellect declares what is true; mind runs after sensory pull, intellect sets its direction. And the Self is the silent witness of all these activities—who neither thinks nor decides, but in whose light both mind and intellect become active.
In the Gita (particularly chapters 14 and 17), the three terms sattvic, rajasic and tamasic describe three fundamental qualities or tendencies of human consciousness, character and action. These are called the three gunas (tri-guna-prakriti)—three streams of nature by which all creation and human consciousness are governed.
This concept of the three gunas arose from Samkhya philosophy—where it is said that nature or natural power consists of these three qualities. Each quality is consciousness’s different hue—just as light, motion and darkness together give form to the world, so sattvic, rajasic and tamasic together compose human mind and action.
Sattvic (sattva-guna) means purity, clarity, knowledge, peace and equanimity. The Gita (14.6) says—”Sattva, being pure, is luminous and without disease; it binds through attachment to happiness and knowledge”—that is, sattva-guna is pure and luminous; it is connected with joy and knowledge. A sattvic person is naturally peaceful, controlled, truthful, virtuous and Self-knowledge oriented. They act but without attachment to results, keep mind steady, wish others well. Sattva’s symbol is clear light—where nothing is hidden.
Rajasic (rajo-guna) means motion, energy, desire, ambition and restlessness. The Gita (14.7) says—”Know rajas to be of the nature of passion, arising from craving and attachment”—that is, rajo-guna arises from desire and attachment. A rajasic person is action-oriented, but their action contains personal will and expectation of results. They are energetic, combative, ambitious, but not steady—joyful in success, dejected in failure. Rajas’s symbol is agitated fire—which burns, consumes—not peaceful.
Tamasic (tamo-guna) means darkness, inertia, ignorance and laziness. The Gita (14.8) says—”Know tamas to be born of ignorance, deluding all embodied beings”—that is, tamo-guna gives birth to foolishness, delusion and inactivity. A tamasic person is lazy, indifferent, covered by fear and doubt, easily angry or depressed. They have little awareness or conscience; they incline toward sleep, confusion, and negative tendencies. Tamas’s symbol is dense darkness—where there is no light, no movement.