Logic, like lyrical poetry, is no employment for the middle-aged. - John Maynard Keynes

Most men love money and security more, and creation and construction less, as they get older.

For each individual it is a great advantage to retain the rights over the fruits of his labour even though he must put off the enjoyment of them. His personal wealth is thus increased. For that is what wealth is,—command of the right to postponed consumption.

His peculiar gift was the power of holding continuously in his mind a purely mental problem until he had seen it through.