As long as you persevere, you'll eventually succeed.
Tips
history
Comes straight from 《荀子·劝学》: 锲而舍之,朽木不折;锲而不舍,金石可镂 — chisel and quit, even rotten wood won't break; chisel without quitting, even metal and stone can be carved. Xunzi's classic argument for persistence.
register
Formal, written, and elevated — the kind of phrase used in speeches, essays, and academic writing, not casual conversation.