I think it fits perfectly well. How many times it was hard to continue to practice but we didn't give up and didn't quit? We keep going because we believe in our goal no matter how unattainable it may seem at the present moment.
Of course, there is so much more to becoming a serious organist than simply continuing to practice but this may well be the key ingredient.
When we hear that voice in the back of our heads asking "is it really worth it?" or "is it for me?", we have a chance to show our quality by ignoring it and sticking to the plan.
One thing that helps me in such situation, is to remember that all great organ masters who set out to do something remarkable also had these moments but they persevered. (Of course, they had to quit many other things along their journey). In fact, this is called "the Dip" and Seth Godin has written a book about it.
Actually, the louder that voice in the back of our heads says that "it isn't worth it", the more reasons we have to believe that it's quite the opposite.
If we continue to practice, usually success is not too far away.
By the way, do you want to learn my special powerful techniques which help me to master any piece of organ music up to 10 times faster? If so, download my video Organ Practice Guide.