"In a passage quoted previously in this essay, Milton said that differences of opinion, ‘which though they may be many, yet need not interrupt the unity of spir

"In a passage quoted previously in this essay, Milton said that differences of opinion, ‘which though they may be many, yet need not interrupt the unity of spirit, if we could but find among us the bond of peace.’ There is but one kind of unity possible in a world as diverse as ours. It is unity of method, rather than of aim; the unity of the disciplined experiment. There is but one bond of peace that is both permanent and enriching: the increasing knowledge of the world in which experiment occurs. With a common intellectual method and a common area of valid fact, differences may become a form of coöperation and cease to be an irreconcilable antagonism."