Right on, whoever said this! This is my mantra in a way. It has kept me alive and in many ways thriving. I have had a physical disability (spina bifida) all of my life (I am 28 ). I get around with crutches adequately enough for a good busy lifestyle. I have a paid job, a college degree, and a great sense of self (I am part of a fan club for a professional soccer team in town, and am also following the local college gymnastics team on some of their road meets).
Unfortunately, I have trouble communicating with people sometimes, particularly some non-disabled folks (let me stress not all of them. Some folks out there are quite enlightened). I've run into many that either pity me to no end or slam me with patronizing complements like "Geez, I don't know how you face life each day and come to work, blah blah blah. You are soooooo "courageous (or "inspirational" or "brave" or what have you)". This behavior, not my own physical limitations, is what has sometimes put me into a deep depression to where I have contemplated ending it. However, I have realized that if I were to end it, I'd just be letting all the aforementioned people win. I'd also be dragging my true friends down with me to some extent---folks who have gone out of their way to show true human respect to me.
You, whatever it is that depresses you, cannot let this enemy win. As the above quote implies, there's a lot to be said for life's struggles. They can be enlightening, fascinating, and if you win these struggles, comforting.
Find whatever little thing it is that you like, hobbywise or otherwise, and expand that part of your life. That can be a great builder of bridges.
Sorry for the long windedness, and very sorry if anyone felt pidgeonholed. It was not my intent, but the lessons I've learned are important for me to share.
Cheers.
Cory