Robert Hooke Quote

He... that would make thorough Discovery, must begin from the most sensible, obvious and plain Effects of Nature; of these he must make a diligent Inquiry, first what is done, and then as near as may be how 'tis done. In Harry Woolf (ed.)

The Posthumous Works of Robert Hooke, Lectures of Light, Section II (p. 84), Johnson Reprint Corporation. 1969