The most rewarding part of science is seeing your work help others.

Then it was that Margaret, sitting alone with tears dropping often on her work, felt how rich she had been in things more precious than any luxuries money could buy—in love, protection, peace, and health, the real blessings of life.

All the choir of heaven and furniture of earth - in a word， all those bodies which compose the frame of the world - have not any subsistence without a mind.