"If statements of fact themselves depend upon the person who observes them, how much more distinct is the reflection of the personality of him who gives an account of methods and of philosophical specu…"

"I think that scientific predictions, if they are to be truly scientific, must be capable of being disproven."

"It is the function of science to discover the existence of a general reign of order in nature and to find the causes governing this order. And this refers in equal measure to the relations of man - so…"

"I saw in a dream a table where all the elements fell into place as required."

"The most all penetrating spirit before which will open the possibility of tilting not tables, but planets, is the spirit of free human inquiry. Believe only in that."