“Most psychologists agree at least some of our analytical ability is innate; however, most also agree common sense is not innate but derived from learned experiences; since common sense which I refer to as reasoned judgment requires analysis, then reasoned judgment must be partly innate.”

Speech in Leeds (13 March 1925), quoted in On England, and Other Addresses (1926), p. 62.
1925
Context: We were not peculiarly impressed with speeches that talked of the glorious time that was coming after the war. We realised what the war meant in the world. We felt the foundations of civilisation in Europe cracking. We knew as business men that for a generation this country and the world would be as a whole far, far poorer, and we realised early the struggle that must result to repair the cracks in the foundations of our civilisation and to restore to the country that level of prosperity which she had enjoyed before the war. I think, too, many of us had little faith in supermen. I think that our experience in business had taught us that, as a matter of fact, there are no such things as supermen, and that we should have to rely on the innate common-sense, integrity, courage and faith of the common men and women of this country if we were to make good.

p. 14

Source: Experimental researches in chemistry and physics

Part I, Meditation V: Of the Predestined http://en.wikisource.org/wiki/The_Physiology_of_Marriage/Part_1/Med_5.
Physiology of Marriage (1829)
Context: Love is the most melodious of all harmonies and the sentiment of love is innate. Woman is a delightful instrument of pleasure, but it is necessary to know its trembling strings, to study the position of them, the timid keyboard, the fingering so changeful and capricious which befits it.

Source: De l'esprit or, Essays on the Mind, and Its Several Faculties (1758), p. 21

Source: The Characteristics of the Present Age (1806), p. 20