What I must do is all that concerns me, not what the people think. This rule, equally arduous in actual and in intellectual life, may serve for the whole distinction between greatness and meanness.
While people are often content to criticize and blame others for what goes wrong, surely we should at least attempt to put forward constructive ideas. One thing is for certain: given human beings' love of truth, justice, peace, and freedom, creating a better, more compassionate world is a genuine possibility. The potential is there.
Finish each day and be done with it. You have done what you could. Some blunders and absurdities no doubt crept in; forget them as soon as you can. Tomorrow is a new day; begin it well and serenely and with too high a spirit to be encumbered with your old nonsense.
Every one who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the Universe-a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble.
I like living. I have sometimes been wildly, despairingly, acutely miserable, racked with sorrow, but through it all I still know quite certainly that just to be alive is a grand thing.
Take a journey into the things which you are carrying, the known- not into the unknown-into what you already know: your pleasures, your delights, your despairs, your sorrows. Take a journey into that, that is all you have.