Why Yes to What is?

Everyone is saying "acceptance: and "saying Yes to what is" is the path to peace. What is the logic behind saying yes to what is. What happens when you say yes to what is or accept things as they are ?..

When you say yes completely, there ends further thoughts. Not accepting causes more thoughts and more pain. If there are no thoughts, there is no pain. I guess that is why the surrender and the acceptance are given so much importance. If you allow your mind to question, it will keep coming up with more thoughts and each of them prevent you from being peaceful. Is there any other reason to be on complete acceptance or surrender? I don't know. Complete surrender or acceptance is peace. Because without a resisting thought, there is no mental pain. Isn't it look very simple ?