The Yaksha asked,—‘What is the best of all laudable things? What is the most valuable of all his possessions? What is the best of all gains? And what is the best of all kinds of happiness?’ Yudhishthira answered,—‘The best of all laudable things is skill; the best of all possessions is knowledge: the best of all gains is health: and contentment is the best of all kinds of happiness.’

In plain words: Yudhishthira says skill is the most praiseworthy thing, knowledge is the most valuable possession, health is the best gain, and contentment is the best kind of happiness.