Above all, avoid lies, all ...

Above all, avoid lies, all lies, especially the lie to yourself. Keep watch on your own lie and examine it every hour, every minute. And avoid contempt, both of others and of yourself: what seems bad to you in yourself is purified by the very fact that you have noticed it in yourself. And avoid fear, though fear is simply the consequence of every lie. Never be frightened at your own faintheartedness in attaining love, and meanwhile do not even be very frightened by your own bad acts.
Above all, avoid lies, all lies, especially the lie to yourself. Keep watch on your own lie and examine it every hour, every minute. And avoid contempt, both of others and of yourself: what seems bad to you in yourself is purified by the very fact that you have noticed it in yourself. And avoid fear, though fear is simply the consequence of every lie. Never be frightened at your own faintheartedness in attaining love, and meanwhile do not even be very frightened by your own bad acts.
 Fyodor Dostoevsky

Quotes from the same author

Love animals: God has given them the rudiments of thought and joy untroubled. Do not trouble their joy, don't harrass them, don't deprive them of their happiness, don't work against God's intent. Man, do not pride yourself on superiority to animals; they are without sin, and you, with your greatness, defile the earth by your appearance on it, and leave the traces of your foulness after you - alas, it is true of almost every one of us!
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 Fyodor Dostoevsky
A widow, the mother of a family, and from her heart she produces chords to which my whole being responds.
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 Fyodor Dostoevsky
...to return to their 'native soil,' as they say, to the bosom, so to speak, of their mother earth, like frightened children, yearning to fall asleep on the withered bosom of their decrepit mother, and to sleep there for ever, only to escape the horrors that terrify them.
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 Fyodor Dostoevsky
God has such gladness every time he sees from heaven that a sinner is praying to Him with all his heart, as a mother has when she sees the first smile on her baby's face.
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 Fyodor Dostoevsky
There is immeasurably more left inside than what comes out in words.
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 Fyodor Dostoevsky