6.19 यथा as, दीपः lamp, निवातस्थः placed in a windless place, न not, इङ्गते flicker, सा that, उपमा simile, स्मृता is thought, योगिनः of the Yogi, यतचित्तस्य of one with controlled mind, युञ्जतः of the practising, योगम् the Yoga, आत्मनः of the Self.Commentary: This is a beautiful simile. Yogins ote this simile very often when they talk of concentration or steadiness or onepointedness of the mind. A steady mind will serve as a powerful searchlight to find out the hidden spiritual treasures of the Self.