Ayn Rand, Atlas Shrugged

"Live and act within the limit of your knowledge and keep expanding it to the limit of your life."

"People, he thought, were as hungry for a sight of joy as he had always been--for a moment's relief from that gray load of suffering which seemed so inexplicable and unnecessary. He had never been able to understand why men should be unhappy."

"The view that man was ever to be drawn by some vision of the unattainable shining ahead, doomed ever to aspire, but not to achieve, my life and my values could not bring me to that."

"We are born into this world unarmed - our mind is our only weapon."

"Let me give you a tip on a clue to men's characters: the man who damns money has obtained it dishonorably; the man who respects it has earned it."

"I take no pride in hopeless longing; I wouldn't hold a stillborn aspiration. I'd want to have it, to make it, to live it."

"You know, I think that only if one feels immensely important can one feel truly light."

"She watched the tunnels as they flowed past: bare walls of concrete, a net of pipes and wires, a web of rails that went off into black holes where green and red lights hung as distant drops of color. There was nothing else to dilute it, so that one could admire naked purpose and the ingenuity that had achieved it."

"I started my life with a single absolute: that the world was mine to shape in the image of my highest values and never to be given up to a lesser standard, no matter how long or hard the struggle."

"Devotion to the truth is the hallmark of morality; there is no greater, nobler, more heroic form of devotion than the act of a man who assumes the responsibility of thinking."

"Do not let your fire go out, spark by irreplaceable spark in the hopeless swamps of the not-quite, the not-yet, and the not-at-all. Do not let the hero in your soul perish in lonely frustration for the life you deserved and have never been able to reach. The world you desire can be won. It exists.. it is real.. it is possible.. it's yours."

"I do not think that tragedy is our natural fate and I do not live in chronic dread of disaster. It is no happiness, but suffering that I consider unnatural. It is not success, but calamity that I regard as the abnormal exception in Human Life."

"If you don't know, the thing to do is not to get scared, but to learn."

"Power-lust is a weed that grows only in the vacant lots of an abandoned mind."

"Do not let your fire go out, spark by irreplaceable spark in the hopeless swamps of the not-quite, the not-yet, and the not-at-all. Do not let the hero in your soul perish in lonely frustration for the life you deserved and have never been able to reach. The world you desire can be won. It exists.. it is real.. it is possible.. it's yours."

"Congress shall make no law abridging the freedom of production and trade..."

"Who is John Galt?"

"I never found beauty in longing for the impossible and never found the possible to be beyond my reach."