knock (one's) head against a/the wall

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knock (one's) head against a/the wall

To attempt continuously and fruitlessly to accomplish some task or achieve some goal that is or seems ultimately hopeless. I feel like I've been knocking my head against the wall trying to understand this math equation. Some people are never going to agree with you on this, so it's no use knocking your head against a wall trying to convince everyone.
See also: head, knock, wall
References in classic literature ?
I mean to knock your head against the wall,' neturned John Harmon, suiting his action to his words, with the heartiest good will; 'and I'd give a thousand pounds for leave to knock your brains out.
You knock your head against the wall and say, 'Am I crazy?