Fyodor Dostoyevsky
Publisher: Penguin Classics (2003)

The main thing is that you stop telling lies to yourself. The one who lies to himself and believes his own lies comes to a point where he can distinguish no truth either within himself or around him, and thus enters into a state of disrespect towards himself and others. Respecting no one, he loves no one, and to amuse and divert himself in the absence of love he gives himself up to his passions and to vulgar delights and becomes a complete animal in his vices, and all of it from perpetual lying to other people and himself.