Sri Chinmoy said this quote

“ Unless and until we have peace deep within us, we can never hope to have peace in the outer world. You and I create the world by the vibrations that we offer to it. If we can invoke peace and then offer it to somebody else, we will see how peace expands from one to two persons, and gradually to the world at large. Peace will come about in the world from the perfection of individuals. If you have peace, I have peace, he has peace, and she has peace, then automatically universal peace will dawn. ”