fight your own battles

fight (one's) own battles

To try to overcome challenges without help from anyone else. Mom, he's not a baby anymore—let him fight his own battles.
See also: battle, fight, own

fight your ˈown battles

be able to win an argument or get what you want without anyone’s help: I wouldn’t get involved — he’s old enough to fight his own battles.
See also: battle, fight, own
References in classic literature ?
"Perhaps you think I am come on purpose to quarrel with you, knowing Weston to be out, and that you must still fight your own battle."
But in this life, you must fight your own battles, not rely on others.