Who said "We are not enemies unless we allow ourselves to be."?

This quote is attributed to Romain Rolland.

We are not enemies unless we allow ourselves to be. - Romain Rolland

"We are not enemies unless we allow ourselves to be."

Romain Rolland Peace

Novelist Musician French 1866–1944

"Life is a beautiful struggle."

"Art is the effort of man to express the unspoken."

"Music is the one incorporeal entrance into the higher world of knowledge."

"Love is life's blood."

"Peace comes from a good conscience."

"Life is too short to hold grudges."

"A man's home is his sanctuary. It should be treated as such."

"The world is chaotic enough. At least your home should make sense."