Above all, don't lie to yourself. The man who lies to himself and listens to his own lie comes to a point that he cannot distinguish the truth within him, or around him, and so loses all respect for himself and for others. And having no respect he ceases to love... Fyodor Dostoevsky Self-deception is common and universal, and the cause of most human tragedies. Of course, the science of self-deception can help us to live better and get more out of life. But it can also cast a murky light on human nature and the human condition, for example, on such exclusively human phenomena as anger, depression, fear, pity, pride, dream making, love making, and god making, not to forget age-old philosophical problems such as selfhood, virtue, happiness, and the good life. Nothing, in the end, could possibly be more important.