From my studies with Dr. Ilchi Lee.  I found that inner peace can be achieved through acceptance of now.  When I accept what-ever good or bad that is happening in or around my body I can feel at ease without much or any worry.  The part that takes practice is maintaining this feeling of peace.  I have to keep telling myself that it is okay.  That feeling of total acceptance is easy to experience one time.  It is challenging to experiecnce the same feeling in different situations.