Things do not happen. Things are made to happen.
Wherever you are - be all there.
Problems are not stop signs, they are guidelines.
If you think you can do it, you can.
The most effective way to do it, is to do it.
It's always too early to quit.
The dog that trots about finds a bone.
You never know what motivates you.
If you're going through hell, keep going.
To be a good loser is to learn how to win.
In 1948 I entered the Massachusetts Institute of Technology, undecided between studies of chemistry and physics, but my first year convinced me that physics was more interesting to me.