Grit and self-control are related, but they're not the same thing.
If you are a young person who is wanting to develop a passion, you cannot expect anyone else to tell you what that passion would be.
The words that we use I think are symbolic of the values that we hold.
Really, what matters in the long run is sticking with things and working daily to get better at them.
There are no shortcuts to true excellence.
Boredom is a very self-conscious emotion by definition. Interest is not. So you can actually be completely absorbed in something and, at certain points in your development, not even realize that you're into it.