Mahabharata 6.28.19
यथा दीपो निवातस्थो नेङ्गते सोपमा स्मृतायोगिनो यतचित्तस्य युञ्जतो योगमात्मनः
yathā dīpo nivātastho neṅgate sopamā smṛtāyogino yatacittasya yuñjato yogamātmanaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book