We don’t know all the answers. If we knew all the answers we’d be bored, wouldn’t we? We keep looking, searching, trying to get more knowledge. 545
Having knowledge but lacking the power to express it clearly is no better than never having any ideas at all. 768
The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes. 553
Knowledge is not a passion from without the mind, but an active exertion of the inward strength, vigor and power of the mind, displaying itself from within. 560
Any knowledge that doesn’t lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life. 773
We live on an island surrounded by a sea of ignorance. As our island of knowledge grows, so does the shore of our ignorance. 579