The ordinary man is ruined by the flesh lusting against the spirit; the scholar by the spirit lusting too much against the flesh.

Nothing can contribute more to peace of soul than the lack of any opinion whatever.

A sure sign of a good book is that you like it more the older you get.

With prophecies the commentator is often a more important man than the prophet.

To be content with life or to live merrily, rather all that is required is that we bestow on all things only a fleeting, superficial glance; the more thoughtful we become the more earnest we grow.

If an angel were to tell us about his philosophy, I believe many of his statements might well sound like '2 x 2= 13'.

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.