Hi The metaphor here is having a barrel, making a small hole in it, and then tapping into that hole something that will act as a tap. Like a barrel of beer. So far as I know, this is why the two words are related: to tap something (say, hit it with a hammer); and sink-tap (the thing on the edge of a sink) So it means that Emmet Fox's ideas were like a barrelful of liquid, and Dyer and Hicks and others found ways of using his ideas for their own purposes I suppose it goes without saying that they accepted his ideas, but it means more than that Dave
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.