Charles Sanders Peirce Quote

[Science] advances by leaps; and the impulse for each leap is either some new observational resource, or some novel way of reasoning about the observations. Such novel way of reasoning might, perhaps, be considered as a new observation means, since it draws attention to reactions between facts which would previously have been passed by unperceived.

Philosophical Writings of Peirce, Chapter 4 (p. 51), Dover Publications. 1955