Without hard work, nothing grows but weeds.
Leap, and the net will appear.
Only the educated are free.
It's always too early to quit.
If you're going through hell, keep going.
If you think you can do it, you can.
Expect problems and eat them for breakfast.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
Begin to be now what you will be hereafter.
The scientist is motivated primarily by curiosity and a desire for truth.
Science, almost from its beginnings, has been truly international in character. National prejudices disappear completely in the scientist's search for truth.