“And besides; the problem of land, at its worst, is a bye one; distribute the earth as you will, the principal question remains inexorable, —Who is to dig it? Which of us, in brief word, is to do the hard and dirty work for the rest, and for what pay?</b”

“If you try to solve a hard problem, the question is not whether you will use a powerful enough language, but whether you will (a) use a powerful language, (b) write a de facto interpreter for one, or (c) yourself become a human compiler for one.”

“Rocket engineering is not like ditch digging. With ditch digging you can get 100 people and dig a ditch, and you will dig it a hundred times as faster if you get 100 people versus one. With rockets, you have to solve the problem of a particular level of difficulty; one person who can solve the problem is worth an infinite number of people who can’t.”

“"What is truth?" is a fundamental question. But what is it compared to "How to endure life?" And even this one pales beside the next: "How to endure oneself?" - That is the crucial question in which no one is in a position to give us an answer.”

“What are the earth and all its interests beside the deep surmise which pierces and scatters them?”

“What has to die will die, and what has to remain will remain. Supposing you dig a well and the water dries up. Just because the well went dry, you cannot say that there is no water there. You cannot say that the spring is dead, for if you dig down one more foot, water will again spring up. If people will only dig a little deeper, they will find the water there. Of course, they can say, “There is no water in the well any more,” and go away. But those who have real thirst will dig a little deeper, and they will find water there. What is will always be. That which dies is dead and gone, but that which is will always be.”

“The traditional approach has tended to obscure the nature of the choice that has to be made. The question is commonly thought of as one in which A inflicts harm on B and what has to be decided is: how should we restrain A? But this is wrong. We are dealing with a problem of a reciprocal nature. To avoid the harm to B would inflict harm on A. The real question that has to be decided is: should A be allowed to harm B or should B be allowed to harm A?”

“Look, it's not you. It's, and my inability to dig dirty dudes.”

“Understand the problem. What kind of problem is it? There are three main types of problems:
‘Show that …’ or ‘Evaluate …’ questions, in which a certain statement has to be proved true, or a certain expression has to be worked out;
‘Find a…’ or ‘Find all…’ questions, which requires one to find something (or everything) that satisfies certain requirements;
‘Is there a …’ questions, which either require you to prove a statement or provide a counterexample”

“If in any process there are a number of contradictions, one of them must be the principal contradiction playing the leading and decisive role, while the rest occupy a secondary and subordinate position. Therefore, in studying any complex process in which there are two or more contradictions, we must devote every effort to finding its principal contradiction. Once this principal contradiction is grasped, all problems can be readily solved.”