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'm right if I believe otherwise. I simply go on with my life with a newfound understanding that, to some people, the sky may indeed look 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?