Ernst Mach Quote

An incomplete knowledge put into words forms a relatively firm prop for fleeting thoughts, from which the thoughts, seeking among facts, set out, and to which, modifying it by criticism and comparison, they continually return.

The Science of Mechanics: A Critical and Historical Account of Its, Development, Appendix of Additions and Alterations to the Seventh German Edition (p. 14), The Open Court Publishing Co. 1915