Jesus showed forgiveness when he was dying on a cross and said "Father, forgive them" and he forgave Peter for denying him 3 times
Jesus' sacrifice was made for our salvation (forgiveness of sins) and so Catholics should also forgive
Jesus taught forgiveness in the parable of the prodigal son
Our Father teaches forgiveness "forgive those who trespass against us"
Jesus taught to forgive 70x7 meaning endlessly
Jesus taught "if you do notforgive others their sins, you Father will not forgiveyoursins"
Catholic Church believes that a person can be forgiven by praying to God. However, they can also receive the Sacrament of Reconciliationwhereby a person can seek absolution from their sins
Example of people forgiving
Martin Luther King Jr chose to forgive those who were racist towards him
1981, PopeJohnII was shot 4 times. 2 years later he visited his assassin in prison to say that he forgave him