Who sows barley cannot reap wheat.
More Persian Proverbs:
Thick body, weak soul.Persian
The wise man who does not put his knowledge into practice is like a bee that gives no honey.
Persian
Work is twice done by the man in a hurry.
Persian
You only appreciate your father the day you become a father yourself.
Persian
You cannot hang everything on one nail.
Persian
Flies will easily fly into the honey -- their problem is how to get out.
Persian