Such diverse excellencies are expressed in [God] towards men, that otherwise would have seemed impossible to be exercised towards the same object; as particularly these three, justice, mercy, and truth. The same that are mentioned in Psalm 85:10, “Mercy and truth are met together, righteousness and peace have kissed each other.” The strict justice of God, and even his revenging justice, and that against the sins of men, never was so gloriously manifested as in Christ. He manifested an infinite regard to the attribute of God’s justice, in that, when he had a mind to save sinners, he was willing to undergo such extreme sufferings, rather than that their salvation should be to the injury of the honour of that attribute. And as he is the Judge of the world, he doth himself exercise strict justice; he will not clear the guilty, nor at all acquit the wicked in judgment. Yet how wonderfully is infinite mercy towards sinners displayed in him! And what glorious and ineffable grace and love have been and are exercised by him, towards sinful men! Though he be the just Judge of a sinful world, yet he is also the Saviour of the world. Though he be a consuming fire to sin, yet he is the light and life of sinners. “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; to declare, I say, at this time his righteousness, that he might be just, and the justifier of him which believeth in Jesus” (Romans 3:25-26).
Jonathan Edwards, WJE, 1:682–683.