I begin with the young. We older ones are used up but my magnificent youngsters! Are there finer ones anywhere in the world? Look at all these men and boys! What material! With you and I, we can make a new world.
Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be: a statesman, a businessman, an official, or a scholar.
Multa ferunt anni venientes commoda secum, Multa recedentes adimiunt. (The years, as they come, bring many agreeable things with them; as they go, they take many away.)
By his machines man can dive and remain under water like a shark; can fly like a hawk in the air; can see atoms like a gnat; can see the system of the universe of Uriel, the angel of the sun; can carry whatever loads a ton of coal can lift; can knock down cities with his fist of gunpowder; can recover the history of his race by the medals which the deluge, and every creature, civil or savage or brute, has involuntarily dropped of its existence; and divine the future possibility of the planet and its inhabitants by his perception of laws of nature.
Stick to the man who looks out of the window and tries to understand the world. Keep clear of the man who looks in at the window and tries to understand you.