Col. William Draper, President Eisenhower's Air Force One pilot, told former president Eisenhower that after many years of service he was being forced into retirement because of a heart problem, which would necessitate a new career as an airline executive. He confided that he was worried about whether he would be able to succeed in the corporate world. On listening to Draper, Ike said to his longtime pilot, "Go ahead, be scared, and do it anyway."
Whether Eisenhower was frightened or scared we will never know. But he once articulated his simple formula in a letter to Mamie that contained the critical word. He wrote that it was imperative on him to "struggle is to do one's best; to keep the brain and the conscience clear; never be swayed by unworthy motives of inconsequential reasons, but to strive to unearth the basic factors involved and then do one's duty."
-Susan Eisenhower, How Ike Led: The Principles Behind Eisenhower's Biggest Decisions