Using a pet as an example is not good either. We are not "pets" to God, we are his children. Children are to emulate their parents. All men are to repent, because scripture clearly says all have sinned. When we repent from our sins, we become like the Father (having no sins). It addresses that issue. Jesus wanted us to become like the Father in heaven. But for man to become like the Father, we have to repent of our sins, and forgive our debtors. However, when Jesus speaks about forgiving one's debtor, it is in the context of the Father in heaven forgiving His debtors. Jesus likens the Father in heaven to a father on earth. Jesus himself said God shows kindness to the "ungrateful and evil". Jesus was making the point that God the Father is like a good father here on earth, even more so. God has no sin, man did. Yet, Jesus said we must be perfect like our Father in heaven is perfect. If Jesus told us to love our enemies and forgive those who have hurt us, yet God himself would not do that very thing, then that would mean we are more perfect than the Father is.
