تربیت نااهل، چون گردکان بر گنبد است.
tarbiyate na-ahl, chone gordekan bar gonbad ast.
Educating the unworthy is like a walnut on a dome.
Signification
It is futile to try to teach or train someone who is unwilling or unable to learn.
Signification
It is futile to try to teach or train someone who is unwilling or unable to learn.