You never know what motivates you.
Always desire to learn something useful.
Things do not happen. Things are made to happen.
Be kind whenever possible. It is always possible.
It's always too early to quit.
Expect problems and eat them for breakfast.
Be thine own palace, or the world's thy jail.
The dog that trots about finds a bone.
Quality is not an act, it is a habit.
I can, therefore I am.
Sound is the vocabulary of nature.
The world changes materially. Science makes advances in technology and understanding. But the world of humanity doesn't change.