John Lewis Gaddis

“Historical consciousness therefore leaves you, as does maturity itself, with a simultaneous sense of your own significance and insignificance. Like Friedrich's wanderer, you dominate a landscape even as you're diminished by it. You're suspended between sensibilities that are at odds with one another, but it's precisely within that suspension that your own identity--whether as a person or a historian--tends to reside. Self-doubt must always precede self-confidence. It should never, however, cease to accompany, challenge, and by these means discipline self-confidence.”
― John Lewis Gaddis, The Landscape of History: How Historians Map the Past

“if you were to take account of everything . . . , you would never do anything. It is better to have a brave heart and endure one half of the terrors we dread than to [calculate] all of the terrors and suffer nothing at all. . . . Big things are won by big dangers.”
― John Lewis Gaddis, On Grand Strategy