Lamps make oil-spots and candles need snuffing; it is only the light of heaven that shines pure and leaves no stain.

The eternal female draws us onward.

Deny yourself! You must deny yourself! That is the song that never ends.

Faust: Who holds the devil, let him hold him well, He hardly will be caught a second time.

Nature! We live in her midst and know her not. She is incessantly speaking to us, but betrays not her secret. We constantly act upon her, and yet have no power over her. Variant: NATURE! We are surrounded and embraced by her: powerless to separate ourselves from her, and powerless to penetrate beyond her.

Unlimited activity, of whatever kind, must end in bankruptcy.

If we meet someone who owes us a debt of gratitude, we remember the fact at once. How often we can meet someone to whom we owe a debt of gratitude without thinking about it at all!