Forgiveness isn't automatic, it takes a lot of HARD WORK, but not only does it put you in a position of strength, it is essential if we want this day to arrive:

Then let us pray that come it may
(As come it will for a' that)
That Sense and Worth o'er a' the earth
Shall bear the gree an' a' that!
For a' that, an' a' that,
It's comin yet for a' that,
That man to man the world o'er
Shall brithers be for a' that.

And, no, forgiving doesn't mean that you aprove of or condone what the person does, it's accepting them as a brother DESPITE what they did.