Read 2 Peter 1, most specifically verses 5-10. As we are adding to our virtue kindness and love, it can often become a habit to look at others and their lack of virtue. 1 Peter is telling us to remember that that’s where we came from. We have our own checkered past and the remembering of it and the remembering of God’s love for us even while we were checkered, helps us to love others a little easier. Don’t forget but don’t dwell/live there. But let it soften our hearts toward others and love.