Avoid being scornful, both to others and to yourself. What seems to you bad within you will grow purer from the very fact of your observing it in yourself. Avoid fear, too, though fear is only the consequence of every sort of falsehood.
 Fyodor Dostoyevsky, The Brothers Karamazov (1880). copy citation

Context

“If you do not [pg 058] attain happiness, always remember that you are on the right road, and try not to leave it. 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. Avoid being scornful, both to others and to yourself. What seems to you bad within you will grow purer from the very fact of your observing it in yourself. Avoid fear, too, though fear is only the consequence of every sort of falsehood. Never be frightened at your own faint-heartedness in attaining love. Don't be frightened overmuch even at your evil actions. I am sorry I can say nothing more consoling to you, for love in action is a harsh and dreadful thing compared with love in dreams.” source