We cannot observe external things without some degree of Thought; nor can we reflect upon our Thoughts, without being influenced in the course of our reflection by the Things which we have observed.

(1852) Lectures on the history of Moral Philosophy. He was Second Wrangler in 1816 President of the Cambridge Union Society in 1817 became fellow and tutor of his college and in 1841 succeeded Dr Christopher Wordsworth as master. (1857) Spedding's complete edition of the works of Bacon.

William Whewell FRS FGS (pron. : /ˈhjuːəl/ HEW-əl; 24 May 1794 – 6 March 1866) was an English polymath scientist Anglican priest philosopher theologian and historian of science. He was Master of Trinity College Cambridge.