The Alexander & Mabel Bell Legacy Foundation's own account of the March 10, 1876 first telephone call, independent of Wikiquote — quotes the exact same words. (loc.gov's page hosting Bell's actual lab notebook 403'd on fetch — would be the strongest possible citation if reached directly.)
Nothing made from these words yet — Storyfaire is where they get made.
A man, as a general rule, owes very little to what he is born with. A man is what he makes of himself.Alexander Graham Bell