Forgiveness is hard. Pain and betrayal is not objective, it cannot be measured on the same scale for everyone. There is no universal recipe for forgiveness. It takes time, conversation, and prayer and each of us do it our own way and at our own measurements.
Our Blessed Lord calls us in today's gospel to forgive our brothers or else the Father will subject us to the same torture the servant felt. Forgiveness begins with humility. We must recognize internally that we have been wronged and that it is possible to forgive. For some it may be forgiving a child who takes $20 from our wallet, for others, it may be forgiving the man or woman who took the life of a loved one.
Lent is our opportunity to reflect on forgiveness. To search inside us to see who we have an have not forgave. Every time we go to Mass or pray the Holy Rosary we ask God to forgive those who trespass against us and for our trespasses against others. Do we really mean the words we say?
So yes, sometimes it may take seventy-seven times. But forgiveness is the fruit of a humble and understanding heart. The heart all of us must have in order to obtain our eternal reward.