Too often in life, something happens and we blame other people for us not being happy or satisfied or fulfilled. So the point is, we all have choices, and we make the choice to accept people or situations or to not accept situations. ↗
If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life. ↗
I should have no objection to go over the same life from its beginning to the end: requesting only the advantage authors have, of correcting in a second edition the faults of the first. ↗