Bhagavad Gita · Chapter 14: The Three Qualities of Nature

Bhagavad Gita 14.6

tatra sattvaṃ nirmalatvātprakāśakamanāmayam | sukhasaṅgena badhnāti jñānasaṅgena cānagha ||

Of these, clarity, being pure, gives light and is free from ill. It binds through attachment to happiness and attachment to knowledge, sinless Arjuna.

Modern context

Sattva is pure, bright and healthy. Yet even it binds, through attachment to happiness and to knowledge. This is subtle and important. A person can become attached to feeling peaceful, or to being the one who knows. Spiritual pride is a sattvic trap: being good and knowing it a little too well. The highest freedom lies even beyond sattva.