Forgive as God does
Eph 4:32 Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
As you may have been noticing, much of Colossians is in parallel with Ephesians as it says, "Therefore, as God’s chosen people, holy and dearly loved, clothe yourselves with compassion, kindness, humility, gentleness and patience. Bear with each other and forgive whatever grievances you may have against one another. Forgive as the Lord forgave you." Col 3:12,13
But it is not unconditional forgiveness which Paul is referring to here. For while God loves everyone unconditionally, his forgiveness is conditional. And thus Jesus also teaches concerning relationships between Christians says, "If your brother sins, rebuke him, and if he repents, forgive him." Luke 17:3 That's the way God forgives. So be kind as God is kind. Be compassionate as God is compassionate. And forgive in the same manner as God forgives.