you will end up in vain if you wish for something you will never get.
OR
wishing for something you cant have is non sense
OR
if you wish for something you cant get,you will always end in vain
you will end up in vain if you wish for something you will never get.
OR
wishing for something you cant have is non sense
OR
if you wish for something you cant get,you will always end in vain