I consider that man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the lumber of every sort that he comes across. The knowledge that might be useful to him gets crowded out or is jumbled up with a lot of other things so that he has difficulty laying his hands on it. It is a mistake to think that the little room has elastic walls and can distend to any size. Depend upon it, there comes a time when for every addition of knowledge you forget something that you knew before.The passage best supports the statement that knowledge