It is impossible to keep spiritual peace if we do not take care of the mind, that is if we do not drive out thoughts that are displeasing to God and, on the contrary, keep thoughts which are pleasing to God. It is necessary to look into the heart with mind and see what is done there. Is it peaceful or not? If not, then find out in what you have sinned.
Silouan the AthoniteWith all your power, ask the Lord for humility and brotherly love, because God freely gives His grace for love towards one's brother. Do an experiment on yourself: one day ask God for love towards your brother, and another day - live without love. You will see the difference.
Silouan the AthoniteSome suffer much from poverty and sickness, but are not humbled, and so they suffer without profit. But one who is humbled will be happy in all circumstances, because the Lord is his riches and joy, and all people will wonder at the beauty of his soul.
Silouan the AthoniteUnderstand two thoughts, and fear them. One says, "You are a saint," the other, "You won't be saved." Both of these thoughts are from the enemy, and there is no truth in them. But think this way: I am a great sinner, but the Lord is merciful. He loves people very much, and He will forgive my sins.
Silouan the Athonite