In the temple of his spirit, each man is alone.

[What for] was the first question he asked about any activity proposed to him - and nothing would make him act, if he found no valid answer. He flew through the days of his summer month like a rocket, but if one stopped him in mid-flight, he could always name the purpose of his every random moment. Two things were impossible to him: to stand still or to move aimlessly.

Any material element or resource which, in order to become of use or value to men, requires the application of human knowledge and effort, should be private property-by the right of those who apply the knowledge and effort.

Even in dialogue, your own style rules your selection. Do not give yourself a blank check of this kind: 'I'll merely reproduce what I think a character like so-and-so would say.' You have to reproduce it in the way your literary premises dictate.

Man—every man—is an end in himself, not a means to the ends of others; he must live for his own sake, neither sacrificing himself to others nor sacrificing others to himself; he must work for his rational self-interest, with the achievement of his own happiness as the highest moral purpose of his life.

The age of the skyscraper is gone. This is the age of the housing project. Which is always a prelude to the age of the cave.

Don't consider our interests or desires. You have no duty to anyone but yourself.