He who wants to become master in his field should study its history. Without historic foundation all knowledge remains incomplete and the judgment about appearances of the present unsure and immature.
-- Friedrich Unger, Die Methodik der Praktischen Arithmetik, (Leipzig: B. G. Teubner, 1888), p. ii

It is a mistake to try to look too far ahead. The chain of destiny can only be grasped one link at a time.
-- Winston Churchill