Let me briefly quote the First Antiphon of the Divine Liturgy of St. John Chrysostom and St. Basil the Great:
Bless the Lord, O my soul: Blessed art Thou, O Lord. Bless the Lord, O my soul; and all that is within me bless his Holy Name. Bless the Lord, O my soul, and not forget all His benefits. Who forgiveth all thy sin, and healeth all thine infirmities. The Lord is full of compassion and mercy, long-suffering and of great goodness. He will not alway be chiding, neither keepeth He His wrath forever. He hath not dealt with us after our sins, nor rewarded us according to our iniquities.
