Jesus has many titles. Perhaps the two most distant titles from each other are brought together at the mercy seat.
John 1:29 The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.
John 1:34 And I saw, and bare record that this is the Son of God.
Rom 3:23 For all have sinned, and come short of the glory of God;
Rom 3:24 Being justified freely by his grace through the redemption that is in Christ Jesus:
Rom 3:25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
Rom 3:26 To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.