The task assumes different shapes at different times. Sometimes the threat to popular government comes from political interests, sometimes from economic interests, sometimes we have to beat off all of them together. But the challenge is always the same—whether each generation facing its own circumstances can summon the practical devotion to attain and retain that greatest good for the greatest number which this government of the people was created to ensure.

Address at the Dedication of the Memorial on the Gettysburg Battlefield (July 3, 1938)