My joy in learning is partly that it enables me to teach.
There is as much greatness of mind in acknowledging a good turn, as in doing it.
The origin of all mankind was the same; it is only a clear and good conscience that makes a man noble, for that is derived from heaven itself.
Our posterity will wonder about our ignorance of things so plain.
Real improvement is of slow growth only.
A thing seriously pursued affords true enjoyment.