Edgar Rice Burroughs said this quote

What are you Tarzan? he asked aloud. An ape or a man? If you are an ape, you will do as the apes do - leave one of your kind in the jungle to die if it suited your whim to go elsewhere.If you are a man, you will return to protect your kind. You will not run away from one of your own people, because one has run away from you.