Useless pursuits and conversations always about the same things absorb the better part of one's time, the better part of one's strength, and in the end there is left a life grovelling and curtailed, worthless and trivial, and there is no escaping or getting away from it—just as though one were in a madhouse or prison.
Men are of three different capacities: one understands intuitively; another understands so far as it is explained; and a third understands neither of himself nor by explanation. The first is excellent, the second, commendable, and the third, altogether useless.