Reach for the moon

Reach for the moon / reach for the stars: desejar alcançar algo muito grande, enfrentar algo muito desafiador, pretender algo extraordinário

“Ever since he was a little boy, Gustav had reached for the moon. It was as if he'd somehow known that he would do great things in his life.”

“Her father always wanted Sylvia to reach for the stars, but Sylvia just wanted to play with her pets and run around in the woods. (www.englishclub.com)