A person never discloses his own character so clearly as when he describes another's.
Character is not made in a crisis -- it is only exhibited.
Make the most of yourself, for that is all there is of you.
You must look into people, as well as at them.
Don't change horses in the middle of a stream.
There is nothing permanent except change.
Everyone thinks of changing the world, but no one thinks of changing himself.
The world hates change, yet it is the only thing that has brought progress.
All change is not growth; all movement is not forward.
The only certainty is that nothing is certain.