Learning without thinking is useless. Thinking without learning is dangerous.
Only the wisest and stupidest of men never change.
Wisdom, compassion and courage - these are the three universally recognized moral qualities of man.
To love a thing means wanting it to live.
I hear and I forget. I see and I remember. I do and I understand.
The father who does not teach his son his duties is equally guilty with the son who neglects them.