Either you run the day or the day runs you.
Go for it now. The future is promised to no one.
Problems are not stop signs, they are guidelines.
After a storm comes a calm.
Never complain and never explain.
The dog that trots about finds a bone.
You never know what motivates you.
To know oneself, one should assert oneself.
If you can dream it, you can do it.
Quality is not an act, it is a habit.
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.