Terms for subject Proverb containing obstacle

English	Russian
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стену не прошибешь
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стенку не прошибешь
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стены не прошибешь