To keep is more important than to make friends.
The crutch of Time accomplishes more than the club of Hercules.
Friends provoked become the bitterest of enemies.
He who laughs at everything is as big a fool as he who weeps at everything.
Never open the door to a lesser evil, for other and greater ones invariably slink in after it.
One should cultivate good habits of memory, for it is capable of making existence a Paradise or an Inferno.