The Bhagavad Gita · core concept · हिंदी में पढ़ें
The three gunas — sattva, rajas, tamas
त्रिगुण (tri-guṇa)
In one sentence
The three gunas are the three fundamental qualities of nature — clarity (sattva), passion (rajas), and inertia (tamas) — that mix in changing proportions in everything and everyone.
The depth — what it actually means
The Gita's most precise psychological tool. Sattva is harmony, lightness, clarity, illumination, peace. Rajas is activity, passion, restlessness, ambition, agitation. Tamas is heaviness, dullness, inertia, confusion, sleep. All three operate constantly. No-one is purely any one of them. What changes is which one is dominant in a given moment, day, season, or stage of life. Chapter 14 and 17 of the Gita describe the gunas in detail — including which food, which charity, which work, which faith belongs to which guna.
Modern application — how to use this today
Audit your day in terms of the gunas. What dominated this morning? This afternoon? Now? Over a month of doing this you will see your guna fingerprint. The Gita does not ask you to be sattva all the time — that is impossible. It asks you to know which guna is operating, so you can ride it instead of being thrown by it.