What is Acceptance

What is Acceptance
Non-acceptance results in suffering.

But some things are totally unacceptable!

You will never be able to fully accept anything that you perceive as totally unacceptable. 
Stop trying - it is impossible.

But you can accept that you cannot accept. This calms down the reactivity and takes you away from mind-based suffering.

Then, if you can do something about what you cannot accept - do it!
But if you can't - accept that you can't. Accept deeply, at the core of your being, and you may find that peace emerges from the depths of our consciousness to envelop the unacceptable.