Frans De Waal said this quote

The initial animosity between divergent approaches can be overcome if we realize that each has something to offer that the other lacks. We may weave them together into a new whole that is stronger than the sum of its parts.

~ Frans De Waal

If we look straight and deep into a chimpanzee's eyes, an intelligent self-assured personality looks back at us. If they are animals, what must we be?

~ Frans De Waal

Along with people in other creative professions, such as artists and musicians, many scientists experience this transcendence. I do so every day. For one, it's impossible to look an ape in the eye and not see oneself. There are other animals with frontally oriented eyes, but none that give you the shock of recognitions of the ape's. Looking back at you is not so much an animal but a personality as solid and willful as yourself.

~ Frans De Waal

Even the staunchest atheist growing up in Western society cannot avoid having absorbed the basic tenets of Christian morality. Our societies are steeped in it: everything we have accomplished over the centuries, even science, developed either hand in hand with or in opposition to religion, but never separately. It is impossible to know what morality would look like without religion. It would require a visit to a human culture that is not now and never was religious. That such cultures do not exist should give us pause.

~ Frans De Waal