Nothing is difficult in the world, if you put your mind to it: Song and Chen's Tales, Volume 9. Nothing is difficult to a willing mind, and nothing is difficult to a willing mind.
There are many similar famous aphorisms.
Elbow grease gives the best polish.
The rope saws wood, but water drops stones.
Perseverance, rotten wood can't be carved; Perseverance can carve stones.
Nothing is difficult to the man who will try.
The road lies with people, but it depends on people's efforts.
I am not afraid of incompetence, but I am afraid of perseverance.
Where there is a will, there is a way.
Whenever and wherever, we can't give up. We must stick to it. It doesn't matter if we slow down as long as we work hard. I believe we will succeed.