..., twice two is four is not life, gentlemen, but the beginning of death.

Nature doesn't ask your permission; it doesn't care about your wishes, or whether you like its laws or not. You're obliged to accept it as it is, and consequently all its results as well.

Nothing is more seductive for a man than his freedom of conscience, but nothing is a greater cause of suffering.

A fool with a heart and no sense is just as unhappy as a fool with sense and no heart.

The whole work of man really seems to consist in nothing but proving to himself every minute that he is a man and not a piano key.

And in vain does the dreamer rummage about in his old dreams, raking them over as though they were a heap of cinders, looking into these cinders for some spark, however tiny, to fan it into a flame so as to warm his chilled blood by it and revive in it all that he held so dear before, all that touched his heart, that made his blood course through his veins, that drew tears from his eyes, and that so splendidly deceived him!

Above all, do not lie to yourself.