We are more different from apes than apes are from viruses. Our difference is a metaphysical chasm. It is obvious and manifest in our biological nature. We are rational animals, and our rationality is all the difference. Systems of taxonomy that emphasize physical and genetic similarities and ignore the fact that human beings are partly immaterial beings who are capable of abstract thought and contemplation of moral law and eternity are pitifully inadequate to describe man.
The assertion that man is an ape is self-refuting. We could not express such a concept, misguided as it is, if we were apes and not men.