Anything that makes weak - physically, intellectually and spiritually, reject it as poison.
If you're not prepared to be wrong, you'll never come up with anything original.
To succeed in your mission, you must have single-minded devotion to your goal.
The more you lose yourself in something bigger than yourself, the more energy you will have.
The fishermen know that the sea is dangerous and the storm terrible, but they have never found these dangers sufficient reason for remaining ashore.
Perseverance and spirit have done wonders in all ages.
If you want creative workers, give them enough time to play.
The expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools.
Man needs his difficulties because they are necessary to enjoy success.
A man can't soar too high, when he flies with his own wings.
We must have perserverence and above all confidence in ourselves. We must believe that we are gifted for something.
Humans have come into being for the sake of each other, so either teach them, or learn to bear them.
Our patience will achieve more than our force.
Whatever lifts the corners of your mouth, trust that.
Only those are fit to live who do not fear to die; and none are fit to die who have shrunk from the joy of life and the duty of life. Both life and death are parts of the same Great Adventure.
If you don't like something, change it. If you can't change it, change your attitude. Don't complain.
We travel. Some of us forever. To seek other states, other lives, other souls.
The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.
I do not care so much what I am to others as I care what I am to myself.
One man with courage is a majority.
We cannot solve our problems with the same thinking we used when we created them.