The man who played Superman becoming a quadriplegic was more than ironic - it was tragic. He never learned to be happy about his situation - who could? But, he did learn to live with it.
“In the morning, I need twenty minutes to cry. To wake up and make that shift, you know, and to just say, 'This really sucks,' to really allow yourself the feeling of loss. It still needs to be acknowledged.” - Christopher Reeve
Then, he'd say, "And now...forward!"
He had to take a moment everyday to acknowledge where he was, what the reality of the situation was. But, he didn't allow that to stop him. He traveled widely doing public speaking on behalf of people with spinal injuries, tirelessly raised money for his own and other foundations, and even became a movie director. He took what he had and tried to help others in the best way he could.