God is a fire that warms and kindles the heart and inward parts. Hence, if we feel in our hearts the cold which comes from the devil - for the devil is cold - let us call on the Lord. He will come to warm our hearts with perfect love, not only for Him but also for our neighbor, and the cold of him who hates the good will flee before the heat of His countenance.
Seraphim of SarovThose who have truly decided to serve the Lord God should practice the remembrance of God and uninterrupted prayer to Jesus Christ, mentally saying: Lord Jesus Christ, Son of God, have mercy on me, a sinner.
Seraphim of SarovIf a man has no worries about himself at all for the sake of love toward God and the working of good deeds, knowing that God is taking care of him, this is a true and wise hope. But if a man takes care of his own business and turns to God in prayer only when misfortunes come upon him which are beyond his power, and then he begins to hope in God, such a hope is vain and false. A true hope seeks only the Kingdom of God... the heart can have no peace until it obtains such a hope. This hope pacifies the heart and produces joy within it.
Seraphim of Sarov