Everyone is a genius at least once a year. The real geniuses simply have their bright ideas closer together.

The great rule: If the little bit you have is nothing special in itself, at least find a way of saying it that is a little bit special.

There is something in our minds like sunshine and the weather, which is not under our control. When I write, the best things come to me from I know not where.

An hour-glass is a reminder not only of time's quick flight, but also of the dust to which we must at last return

The most entertaining surface on earth is the human face.

Astronomy is perhaps the science whose discoveries owe least to chance, in which human understanding appears in its whole magnitude, and through which man can best learn how small he is.

Man is always partial and is quite right to be. Even impartiality is partial.