First of all, if you haven't, you need to take an hour and 16 minutes to See Randy Pausch's Last Lecture. Go ahead. It's well worth your time.
If you've seen it and know what he's talking about re: brick walls, I ask you, is pain a brick wall? Yes or no, but WHY? The floor is yours. If you don't want to set up a Blogger account so you can comment, feel free to send me an email, it's in my profile, and I'll add it for you.