From Epicurus’ letter to Menoeceus (emphasis mine):

Let no one be slow to seek wisdom when he is young nor weary in the search thereof when he has grown old, for no age is too early or too late for the health of the soul. And to say that the season for studying philosophy has not yet come or that it is passed and gone is like saying that the season for happiness is not yet or that it is now no more. Therefore, both old and young ought to seek wisdom. The former, in order that as age comes over him he may be young in good things because of the grace of what has been. And the later, in order that while he is young he may at the same time be old because he has no fear of the things which are to come. So we must exercise ourselves in the things which bring happiness, since if that be present, we have everything. And if that be absent, all our actions are directed toward obtaining it.

How come the act of feeling something is considered more physical than sensing it, yet sensations are perceived to be more tangible than feelings?