"A tool is usually more simple than a machine it is generally used with the hand, whilst a machine is frequently moved by animal or steam power."

"At each increase of knowledge, as well as on the contrivance of every new tool, human labour becomes abridged."

"Some kinds of nails, such as those used for defending the soles of coarse shoes, called hobnails, require a particular form of the head, which is made by the stroke of a die."

"The difference between a tool and a machine is not capable of very precise distinction; nor is it necessary, in a popular explanation of those terms, to limit very strictly their acceptation."

"Today the function of the artist is to bring imagination to science and science to imagination, where they meet, in the myth."

"Like many students, I found the drudgery of real experiments and the slowness of progress a complete shock, and at my low points I contemplated other alternative careers including study of the philosophy or sociology of science."

"Don't confuse hypothesis and theory. The former is a possible explanation the latter, the correct one. The establishment of theory is the very purpose of science."

"Amazingly when you add life and consciousness to the equation you can actually explain some of the biggest puzzles of science."