关于“如果不付出努力就不会成功”的英语名言，以下是一些合适的表达：

No one can achieve anything without effort.

There is no gain without labour.

As long as the deep iron pestle is ground into a needle.

If you don't work hard, you will never succeed.

这些名言都强调了努力对于成功的重要性。希望这些表达对你有所帮助。