Kṛṣṇa describes the psychology of a truly learned person, or a ‘paṇḍita’. He says that such a person is one whose every endeavor is free from the desire for personal sense gratification. They don’t act because they ‘want’ something; they act because it is right. The reactions to such a person’s work are said to be ‘burned up by the fire of knowledge’. Just as a fire can turn a mountain of cotton into a handful of weightless ash, spiritual knowledge turns the heavy burden of karma into nothing. Their actions leave no trace in the soul. A ‘wise’ person is not defined by how many books they have read, but by how much they have purified their motivations. Kṛṣṇa is encouraging Arjuna to light this ‘fire of knowledge’ within himself. If he can fight without the ‘Sankalpa’ (imagination/desire) of personal gain, he will remain as pure as a sage.