What's up Wesley? I have an incomplete spinal cord injury. I broke my neck at eighteen in 1995, couldn't move for a month and then slowly started walking, though I now have a ton of spasticity. As I was in the general neighborhood of your brother's situation, I can give you my thoughts related to your questions.
Have your brother start seeing someone.It probably wouldn't hurt any of us to get in a room with an impartial person and talk about what's going on in our lives- hopes, dreams, fears, and what is stopping us from achieving what we want. I've noticed as I've aged and my life has become more regimented that I ask these questions less and less frequently, to my detriment. Your brother has a lot going on upstairs right now - giving him an hour a week to say whatever he wants could help, even if he might just lie to the therapist initially. Even if he's lying, he's probably trying to convey something. I saw someone for a good amount of time, and spent a lot of it talking about my life before my injury. I was athletic and popular before my injury, so those pre-injury memories were much easier for me to spent my time thinking about than my very uncertain and scary future. Those hours waxing reminiscent may have seemed insignificant, but they built towards revelations down the road - some small, one or two biggies, and they helped me come around to some truths that probably seemed obvious from the outside looking in. Your brother is probably dividing his time between his past life and his present one.
As for trying to motivate him, that is very tricky. I worked pretty hard, but my spinal cord healed better than most people's did, and I always have felt that I could've done more. I do remember the words that my dad told me which still ring very true and apply to your brother too, and could be a way for you to approach him - in life, you only have so much time to devote towards getting better from an injury like this. Once you start going to school again or working, your opportunities to really devote time towards recovery are restricted. Now, things clicked for me when my parents dropped me back onto a college campus - I made a couple new friends and realized that I could be accepted in my new state, and I pursued an independent life up until now. But I do have regrets about really pushing myself physically after my injury, and I'm finally getting back to exercising. But I can tell your brother personally how much freaking harder it is to do it when you're 37 and have less free time and have built up bad habits. If your brother has a shot to improve his life significantly, now is his best time. You could wait until he states an intention to walk, and then bring up his opportunity now versus later, while still keeping the ball in his court.
I don't read a ton of success stories, but this guy impressed me a lot, and I reread this article often to recharge my batteries:
That age is tough though - who doesn't want to still live carefree with no responsibilities, like many 21-year-olds do? Unfortunately, your brother now has more than his buddies. But getting that taste of "normality" is very important. I would just say spend as much time as you can with him, treat him normal, and listen very closely to what he says and how he says it. He will probably give you opportunities to bring up your concerns.
Hope this helps a little. Give me a yell if you have any other questions.
Have a great day,