“Much that is terrible we do not know. Much that is beautiful we shall still discover. Let's sail till we come to the edge.”

“If we let ourselves, we shall always be waiting for some distraction or other to end before we can really get down to our work. The only people who achieve much are those who want knowledge so badly that they seek it while the conditions are still unfavorable. Favorable conditions never come.”

“What we know is not much. What we do not know is immense.”

“America, we have come so far. We have seen so much. But there is so much more to do.”

“Birds know themselves not to be at the center of anything, but at the margins of everything. The end of the map. We only live where someone's horizon sweeps someone else's. We are only noticed on the edge of things; but on the edge of things, we notice much.”

“It is not so much what we know that is important, as what we are and what we do.”