Disqualified?

1Corinthians 9:24 Don’t you realize that in a race everyone runs, but only one person gets the prize? So run to win! 25 All athletes are disciplined in their training. They do it to win a prize that will fade away, but we do it for an eternal prize. 26 So I run with purpose in every step. I am not just shadowboxing. 27 I discipline my body like an athlete, training it to do what it should. Otherwise, I fear that after preaching to others I myself might be disqualified. NLT

I really like what Paul has to say here. Especially the shadowboxing reference. This life of following Christ is real—it is not virtual, not some undoable ideal, not some fantasy island. It is real and it is serious—a Jamaican Rasta once said to me ‘Rastafari is a serious ting, man’—Discipleship with Jesus is a ‘serious ting’.
I run with purpose, I train with purpose, for that high calling.
I want to avoid disqualification from obtaining the prize.
Could it be possible that somehow I (or anyone of us) should become disqualified?