Never complain and never explain.
Without hard work, nothing grows but weeds.
Well done is better than well said.
The wise does at once what the fool does at last.
By failing to prepare, you are preparing to fail.
Always desire to learn something useful.
Things do not happen. Things are made to happen.
The secret of getting ahead is getting started.
If you're going through hell, keep going.
Go for it now. The future is promised to no one.
The best way to have a good idea is to have a lot of ideas.
Satisfaction of one's curiosity is one of the greatest sources of happiness in life.
Facts are the air of scientists. Without them you can never fly.