I have heard Joseph Smith say that if he were emperor of the whole world, holding the destinies of all men in his hands, he would defend the religious rights of every man, whether his religion was right or wrong. And especially ought this to be the case in this American nation, the constitution of which guarantees to all people the right to worship God according to the dictates of their own conscience. This is the broad platform upon which our government has been founded. I have looked upon the Constitution of the United States as one of the best instruments ever devised by man for the government of the inhabitants of the earth.
( Source: Journal of Discourses 24:237 )