The three great elements of modern civilization, Gun powder, Printing, and the Protestant religion.

Wondrous is the strength of cheerfulness, and its power of endurance - the cheerful man will do more in the same time, will do it better, will preserve it longer, than the sad or sullen.

Science must have originated in the feeling that something was wrong.

This world, after all our science and sciences, is still a miracle wonderful, inscrutable, magical and more, to whosoever will think of it.

Wondrous is the strength of cheerfulness, and its power of endurance - the cheerful man will do more in the same time, will do it better, will preserve it longer, than the sad or sullen.