We have seen how happiness is either in the body or in the mind, or in the Atman. With animals, and in the lowest of human beings, who are very much like animals, happiness is all in the body. No man can eat with the same pleasure as a famished dog, or a wolf; so, in the dog and the wolf the happiness is entirely in the body. In men we find a higher plane of happiness, that of thought, and in the Jnani there is the highest plane of happiness in the Self, the Atman. So to the philosopher this knowledge of the Self is of the highest utility, because it gives him the highest happiness possible. Sense gratification or physical things cannot be of the highest utility to him, because he does not find in them the same pleasure that he finds in knowledge itself; and after all, knowledge is the one goal, and is really the highest happiness we know.