What does this mean?

Gibberish

It means if you are willing to do what it takes, then you can do what ever you set your will to do. I’m not sure it’s accurate though.

Are you sure you don;t have it backwards?
Seems to me it should say ” If you can, you will!” haha

Since this is not even remotely a common phrase, why not ask the person who said it to you? Only they know what they meant by it.

It’s just someone uninhibited by proper syntax, who is trying to be clever.

I suspect it might really be something like, “if you will it, you can do it.” As it is, it doesn’t make sense.

That wanting to do something helps you find a way to do it.

I suppose it could mean, “If you have the ability then you’re the type of person who will do it, regardless of what it is.”

Unless you were talking to Yoda; then it might mean “If you have the will to do it then you can do it.”

My answer: “If I could I would.”

If you have the will power to do it, than you can do it.