Because forgiveness is like this: a room can be dank because you have closed the windows, you've closed the curtains. But the sun is shining outside, and the air is fresh outside. In order to get that fresh air, you have to get up and open the window and draw the curtains apart.
Desmond Tutu is a South African Anglican bishop and social rights activist who played a significant role in the fight against apartheid in South Africa. He was awarded the Nobel Peace Prize for his efforts in promoting equality and justice in his country.