Above all, avoid falsehood, every kind of falsehood, especially falseness to yourself. Watch over your own deceitfulness and look into it every hour, every minute. The Karamazov Brothers

Many brief follies--that is what you call love. And your marriage puts an end to many brief follies, with a single long stupidity. Thus Spoke Zarathustra

"The Poet had, who had made a show of attaching no importance to this literary game (though it gnawed at his heart that he himself had not written such beautiful letters, provoking replies even more beautiful), and having no one with whom to fall in love, had fallen in love with the letters themselves — which, as Niketas remarked with a smile — was not surprising, since in youth we are prone to fall in love with love. Baudolino

“How one lives is so far distant from how one ought to live, that he who neglects what is done for what ought to be done, sooner effects his ruin than his preservation.” The Prince