I can, therefore I am.
Who seeks shall find.
It's always too early to quit.
Quality is not an act, it is a habit.
Only the educated are free.
The dog that trots about finds a bone.
Know or listen to those who know.
Leap, and the net will appear.
To know oneself, one should assert oneself.
Without hard work, nothing grows but weeds.
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.