The right to life means that a man has the right to support his life by his own work (on any economic level, as high as his ability will carry him); it does not mean that others must provide him with the necessities of life.

Live and act within the limit of your knowledge and keep expanding it to the limit of your life. Redeem your mind from the hockshops of authority. Accept the fact that you are not omniscient, but playing a zombie will not give you omniscience-that your mind is fallible, but becoming mindless will not make you infallible-that an error made on your own is safer than ten truths accepted on faith, because the first leaves you the means to correct it, but the second destroys your capacity to distinguish truth from error.

Force and mind are opposites; morality ends where a gun begins.

And questions give us no rest. We know not why our curse makes us seek we know not what, ever and ever. But we cannot resist it. It whispers to us that there are great things on this earth of ours, and that we can know them if we try, and that we must know them. We ask, why must we know, but it has no answer to give us. We must know that we may know.

Face a challenge and find joy in the capacity to meet it.

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.

There is only one source of authentic self-confidence: reason.