There are examples of the use of modal verb CAN in proverbs and quotations .

Proverbs

1. No man can serve two masters.
2. A man can die but once.
3. A golden key can open any door
4. Never put off till tomorrow what you can do today.
5. A beggar can never be bankrupt.
6. None can play the fool so well as a wise man.
7. A man can do no more than he can.
8. Give a lie twenty-four hours� start and you can never overtake it.
9. Two of a trade can never agree.
10. Blind men can judge no colours.
11. Two can live as cheaply as one.
12. Don't try to walk before you can crawl .