The fundamental characteristic and nucleus of christian revelation is mercy. The Gospel is the revelation of mercy disclosed to us in Jesus Christ. Mercy, as a fundamental characteristic of all religions, is treated in this article as a property of divinity. In the Old Testament, God is revealed as God of Mercy, »a God of tenderness and compassion, slow to anger, rich in kindness and faithfulness« (Ex 34,6-7). Everything regarding Jahve, God of mercy, in the Old Testament is revealed in the New Testament in the Word incarnated in Jesus Christ. In Jesus Christ everything is divine, everything points to God - from the help-lessness of the infant in Bethlehem to the agony in Gethsemane and death on the Cross. In Jesus, the human and the divine hearts become one, this being the basic truth of faith, the nucleus of the Gospel and of the history of redemption. He came to us to show us the path of perfection, which signifies becoming alike to God in mercy.