The purpose of a spiritual discipline is to give us a way to stop the war, not by our force of will, but organically, through understanding an gradual training.
It does not matter whether you have religion or are an agnostic believe in nothing, You can only appreciate (without knowing or understanding) the mysteries of life.
As long as you are trying to be something other than what you actually are, your mind wears itself out. But if you say, ‘This is what I am, it is a fact that I am going to investigate and understand,’ then you can go beyond.