Sattvic fortitude is the unshakable inner steadiness that holds the mind, the breath, and the senses in check — all through the practice of yoga. It never wavers, never breaks.
Consider a deep-rooted banyan tree in a storm. The wind howls, the branches sway, but the trunk does not move. That is dhriti. The mind pulls in one direction, the senses pull in another, life's circumstances push from every side — and yet this inner strength holds everything together, calm and rooted.
The word 'avyabhicharini' is the defining quality here: that which never deviates. Sattvic fortitude does not come and go with mood or circumstance. It is the steady flame in a sheltered lamp — constant, regardless of what happens outside.