It's always too early to quit.
The man with no imagination has no wings.
Never trust the advice of a man in difficulties.
Find out who you are. And do it on purpose.
The great secret of true success, of true happiness, is this: the man or woman who asks for no return, the perfectly unselfish person, is the most successful.
The world is the great gymnasium where we come to make ourselves strong.
You shape your own destiny.
If you are humble nothing will touch you, neither praise nor disgrace, because you know what you are.
People throw stones at you and you convert them into milestones.
When we see men of a contrary character, we should turn inwards and examine ourselves.
We need never be ashamed of our tears.
Some people feel the rain. Others just get wet.
The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.
A goal is not always meant to be reached, it often serves simply as something to aim at.
Every problem has in it the seeds of its own solution. If you don't have any problems, you don't get any seeds.
Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young.
Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.
Above all things, respect yourself.
Change your thoughts and you change your world.
To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me.
Winners and losers aren't born, they are the products of how they think