We are qualified to forgive if we meet these requirements:

We were wounded.  Only the wounded can forgive those who wound them.

We were wronged.  It is one thing to be hurt and another thing to be wronged, and we need to see the difference.  We must possess the discernment to know that what we suffered, we suffered unfairly.

We have a desire, an inner push, to forgive.  Forgiveness has to come from inside as a desire of the heart. 

We may come to the point at which we desire to be free of the hate and be healed.  That is when we are ready to forgive.