There are also two kinds of truths: truth of reasoning and truths of fact.

Philosophy consists mostly of kicking up a lot of dust and then complaining that you can't see anything.

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.

Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.

The present is big with the future, the future might be read in the past, the distant is expressed in the near.

If we were magically shrunk and put into someone's brain while she was thinking, we would see all the pumps, pistons, gears and levers working away and we would be able to describe the workings completely, in mechanical terms, thereby completely describing the thought processes of the brain. But that description would not contain any mention of thought! It would contain nothing but descriptions of pumps, pistons, levers!

I am convinced that the unwritten knowledge scattered among men of different callings surpasses in quantity and in importance anything we find in books, and that the greater part of our wealth has yet to be recorded.