You must keep sending work out; you must never let a manuscript do nothing but eat its head off in a drawer. You send that work out again and again, while you’re working on another one. If you have talent, you will receive some measure of success – but only if you persist. Isaac Asimov
What this quote means is that regardless of how many times you tried don’t give up, but keep trying. If you know you have talent, you will eventually succeed, but only if you keep trying.