No pessimist ever discovered the secrets of the stars.
The welfare of each is bound up in the welfare of all.
It is a terrible thing to see and have no vision.
health in all lands is among the indispensable guarantees of human progress.
I have depended on books not only for pleasure and for the wisdom they bring to all who read, but also for that knowledge which comes to others through their eyes and their ears.
Walking with a friend in the dark is better than walking alone in the light.