In the index to the six hundred odd pages of Arnold Toynbee's A Study of History, abridged version, the names of Copernicus, Galileo, Descartes and Newton do not occur yet their cosmic quest destroyed the medieval vision of an immutable social order in a walled-in universe and transformed the European landscape, society, culture, habits and general outlook, as thoroughly as if a new species had arisen on this planet.

Newton's apple and Cezanne's apple are discoveries more closely related than they seem.

The principle that the end justifies the means is and remains the only rule of political ethics; anything else is just a vague chatter and melts away between one’s fingers.

The moment of truth, the sudden emergence of a new insight, is an act of intuition.

God is dethroned; and although the incognizant masses are tardy in realizing the event, they feel the icy draught caused by that vacancy. Man enters upon a spiritual ice age; the established churches can no longer provide more than Eskimo huts where their shivering flock huddles together.

Conscious and unconscious experiences do not belong to different compartments of the mind; they form a continuous scale of gradations, of degrees of awareness.

In the pun, two strings of thought are tangled into one acoustic knot.