Often we can help each other most by leaving each other alone; at other times we need the hand-grasp and the word of cheer.

Know what you want to do, hold the thought firmly, and do every day what should be done, and every sunset will see you that much nearer to your goal.

Do your work with your whole heart, and you will succeed - there's so little competition.

It does not take much strength to do things, but it requires great strength to decide on what to do.

I tend to think of the reading of any book as preparation for the next reading of it. There are always intervening books or facts or realizations that put a book in another light and make it different and richer the second or the third time.

Despite the evidence that we already have too many students in higher education, the hot new idea among the political class is to double down by pushing for 'free college tuition.' The problem with the 'free college' idea is, however, not merely financial. It also reinforces the myth that college is appropriate or even possible for all students.

My own ideas on the mechanism of catalytic phenomena were very different from those at one time commonly held, ideas which I no doubt owed to the influence of the illustrious teacher who had guided my first steps in chemistry nearly twenty years before - I refer, of course, to Berthelot.

My mother wanted me to be a reader. She was a reader. Even though she had an 11th-grade education, she was curious about all kinds of things - archeology, anthropology.