We still live in a world in which a significant fraction of people, including women, believe that a woman belongs and wants to belong exclusively in the home; that a woman should not aspire to achieve more than her male counterparts and, particularly, not more than her husband.

The excitement of learning separates youth from old age. As long as you're learning you're not old.

They told me that, as a woman, I'd never get into graduate school in physics, so they got me a job as a secretary at the College of Physicians and Surgeons and promised that, if I were a good girl, I would take courses there.

The only difference between men and women in science is that the women have the babies. This makes it more difficult for women in science but should not be seen as a barrier, for it is merely another challenge to be overcome.

Happiness is not a matter of intensity but of balance, order, rhythm and harmony.

Hope is itself a species of happiness, and, perhaps, the chief happiness, which this world affords.

Happiness is a direction, not a place.

How we feel about ourselves as we read the newspaper, set the table, wash the dishes, recycle the trash and wash our clothes... is essential to our overall happiness and well-being.