Sorrow is the mere rust of the soul. Activity will cleanse and brighten it.
Such is the state of life, that none are happy but by the anticipation of change: the change itself is nothing; when we have made it, the next wish is to change again. The world is not yet exhausted; let me see something tomorrow which I never saw before.
The applause of a single human being is of great consequence.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.