Just because someone has the desire to do something does not mean they have the ability.
Just because someone has the ability does not mean they have the desire.
And yet, we tend to associate these things as hand in hand. True, having the desire AND ability for something is ideal, but it doesn’t always happen that way.
I have the ability to sing. I have a nice gift. I’m not going to blow you away, but I can hold a tune. However, I don’t have a desire to sing in choirs or talent shows or American Idol or something. That’s not something I aspire to be; a singer.
On the flip side, someone can have the desire to sing, but has absolutely no chance of being even a decent singer. Simply put, they don’t have it. Even with practice, it’s never going to happen. They have the heart though. They have the desire.