We must, indeed, all hang together or, most assuredly, we shall all hang separately.

The rotten apple spoils his companion.

He that is of the opinion money will do everything may well be suspected of doing everything for money.

Visit your Aunt, but not every Day; and call at your Brother's, but not every night.

I say it is impossible that so sensible a people [citizens of Paris], under such circumstances, should have lived so long by the smoky, unwholesome, and enormously expensive light of candles, if they had really known that they might have had as much pure light of the sun for nothing.

This gave me occasion to observe, that when Men are employ'd they are best contented. For on the Days they work'd they were good-natur'd and chearful; and with the consciousness of having done a good Days work they spent the Evenings jollily; but on the idle Days they were mutinous and quarrelsome, finding fault with their Pork, the Bread, and in continual ill-humour. (Autobiography, 1771)

What's a Sun-Dial in the shade?