Columbus had all the spirit of a crusader, and, at the same time, the investigating nature of a modern man of science. – Edmund Arthur Helps

He completed the universe, he achieved the physical unity of the globe. – Lamartine

He stands out among the beacon lights of history as a man of vision dominated by a definite purpose. – John George Jones

Every great advance in science has issued from a new audacity of imagination. – John Dewey, The Quest for Certainty, 1929