From the Fathers

"The mind is the rudder of the whole of a man's being. It counsels, it urges and it guides. The soul and the body are directed by the mind. If the mind is right before God, the whole man is right. If the mind is not, then neither is the whole man. If a man only thinks: `There is no God,' this is immediately apparent in his actions. Evil thoughts spring up first, and are quickly followed by evil deeds. Do you see how the inspired knew human nature? He first isolates the cause and then states that which follows. Evil deeds follow inevitably on evil thoughts. Therefore, my brethren, do not believe those who say: `I do not believe in God but I do good works.,' for he who does not believe in God does not know what is good, nor can he distinguish good from evil."

Saint Nikolai Velimirovich