Never complain and never explain.
Leap, and the net will appear.
If you think you can do it, you can.
Be kind whenever possible. It is always possible.
Without hard work, nothing grows but weeds.
The secret of getting ahead is getting started.
The most effective way to do it, is to do it.
The wise does at once what the fool does at last.
What you do today can improve all your tomorrows.
Well done is better than well said.
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.