“What we know is a drop, what we don't know is an ocean.”
“We know only too well that what we are doing is nothing more than a drop in the ocean. But if the drop were not there, the ocean would be missing something.”
“What we are trying to do may be just a drop in the ocean, but the ocean would be less because of that missing drop.”
“All that we do is touched with ocean, and yet we remain on the shore of what we know”
“We don't know what we don't know.”
“What we know is not much. What we don't know is enormous.”