Penance is the greatest good for living creatures. The roots of penance are tranquillity and self-control. By penance one acquires all things that he longs for in his mind.
तपो निःश्रेयसं जन्तोस्तस्य मूलं शमो दमः। तेन सर्वानवाणोति यान् कामान् मनसेच्छति॥