"I have always taken the greatest pleasure in seeking out and acquiring knowledge."

"Our knowledge of the external world is derived from our senses, and our senses are often unreliable."

"Our senses are not always to be trusted."

"It is not enough to walk with great strides, it is necessary to walk in the right road."

"It is true that when I consider how many different beliefs there are among men, I find no reason to choose one rather than another."