Part of our being human is our sinfulness or wickedness. We commit sin a lot of times in our waking hours. And most of the times we commit the same sins all over again. That is one of the things I observed with penitents especially to those who come to the confessionals on a regular basis. And even I, myself that is my experience.
The gospel reading today speaks of forgiveness to a brother who sins. Peter went to Jesus asking if forgiving ang erring brother seven times is already enough. Jesus told him, "not seven times but seventy times seven times.." Jesus is trying to tell us that we need not put a limit in our forgiveness to a brother who sins. Because just like us who ask God for his mercy and forgiveness for the wrong we do every waking hours, God's forgiveness is limitless and extravagant. So, we need to be ready and willing to forgive our brother every time he sins, and asks for forgiveness. We have to bear in mind too, that to err is human but to forgive is divine.
And as Jesus said, we need to forgive that we ourselves also be forgiven.