Though free to think and act, we are held together, like the stars in the firmament, with ties inseparable. These ties cannot be seen, but we can feel them.
I do not think you can name many great inventions that have been made by married men.
The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane.
I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... such emotions make a man forget food, sleep, friends, love, everything.
The feeling is constantly growing on me that I had been the first to hear the greeting of one planet to another.
Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more.