There are people who think that everything one does with a serious face is sensible.

Man loves company - even if it is only that of a small burning candle.

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

Nothing makes one old so quickly as the ever-present thought that one is growing older.

If it were true what in the end would be gained? Nothing but another truth. Is this such a mighty advantage? We have enough old truths still to digest, and even these we would be quite unable to endure if we did not sometimes flavor them with lies.

The more experiences and experiments accumulate in the exploration of nature, the more precarious the theories become. But it is not always good to discard them immediately on this account. For every hypothesis which once was sound was useful for thinking of previous phenomena in the proper interrelations and for keeping them in context. We ought to set down contradictory experiences separately, until enough have accumulated to make building a new structure worthwhile.

What is called an acute knowledge of human nature is mostly nothing but the observer's own weaknesses reflected back from others.