Chapter 14 explains three qualities that are mixed into everything in nature, including us. In Sanskrit they are called the gunas.

Sattva is harmony: calm, clear and kind. Rajas is motion: busy, restless and always wanting more. Tamas is inertia: heavy, sleepy and stuck.

Everyone has all three. Think of a normal day. You might wake up foggy and not want to get out of bed, which is tamas. Later you rush around, stressed and doing ten things at once, which is rajas. Then in a quiet moment, maybe on a walk, you feel peaceful and clear, which is sattva.

The point isn't to feel bad about tamas or rajas. Rajas gets work done, and tamas lets us rest. The point is to notice which one is in charge, and to make more room for sattva.

Some simple things that build sattva: fresh food, enough sleep, time in nature, quiet prayer or meditation, and being around kind people. Things like too much screen time, junk food and constant rushing usually feed the other two.

Krishna's deeper teaching is that the real you, the Self, is beyond all three moods. They are like weather passing through the sky. You are the sky.