who knows how to make use of the talents of others when he does not possess the same
 Henry David Thoreau, A Week on the Concord and Merrimack Rivers (1849). copy citation

Context

“I stand in the friendliest relation, on social and spiritual grounds, to one who does not perceive what practical skill I have, but when he seeks my assistance in such matters, is wholly ignorant of that one with whom he deals; does not use my skill, which in such matters is much greater than his, but only my hands. I know another, who, on the contrary, is remarkable for his discrimination in this respect; who knows how to make use of the talents of others when he does not possess the same; knows when not to look after or oversee, and stops short at his man. It is a rare pleasure to serve him, which all laborers know. I am not a little pained by the other kind of treatment. It is as if, after the friendliest and most ennobling intercourse, your Friend should use you as a hammer, and drive a nail with your head, all in good faith;” source