Hopefully making theology simpler to understand! (2 Corinthians 1:12)

But love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great, and you will be sons of the Most High, for he is kind to the ungrateful and the evil.

Luke 6:35, ESV

God has shown His kindness and goodness to all of us (everyone) who has sinned (rebelled and disobeyed) against Him.

We remember that vengeance is the Lord’s against those who wrong us, and, just as we can never earn grace nor our own salvation but must accept His gift, we give of ourselves to help others.