6815. I was allowed to insinuate the question whether they did not desire to perform some use by virtue of their knowledges; because it is not sufficient to be delighted with knowledges, seeing that knowledges look to uses, and uses must be the ends. From knowledges alone, I told them, there is no use to them, but only to others to whom they may desire to communicate their knowledges; and it is by no means proper for a man who desires to be wise, to halt in knowledges alone, because these are only instrumental causes, intended to serve in the search for uses, which must be of the life. But they answered that they are delighted with knowledges, and that to them knowledges are uses.