The only thing that never changes is that everything changes.
What is today accepted as truth will tomorrow prove to be only amusing.
Anger is a killing thing: it kills the man who angers, for each rage leaves him less than he had been before - it takes something from him.
A ship does not sail with yesterday's wind.
He who plants a tree is a servant of God.
We do not at present educate people to think but, rather, to have opinions, and that is something altogether different.