If someone tells me the sky is green, I simply say 'okay'. I don't need to agree with them, and I don't need to prove them wrong or show them 'proof' that I am right. I simply go on with my life, with a newfound understanding, that to some people the sky looks green. And I'm okay with that. It keeps external conflicts from disturbing my inner peace... and isn't that where world peace begins? With each of us being peaceful?