So I am sure that I have bored everybody who has the misfortune of reading my posts to death by now by repeatedly posting this link:

SMART criteria - Wikipedia, the free encyclopedia

Is forgiveness a good (=SMART) goal?

No.

It is NOT S=Specific
It is NOT M=Measurable
It is more often than not NOT A=Attainable (hence, your OP, right?)
Is it R=Relevant? I do not know; it is probably a matter of belief.
Is it T~time-specific? I do not think so, from observing how others struggle with it.

So... no point to keep trying and trying until it clearly and immediately benefits you.