I believe that happiness is a choice. As a pastor, I have seen many people who are physically challenged, but yet are incredibly happy. They have learned to focus on the blessings in their lives, rather than their limitations. My son Joshua, who is 17, has a friend who is in a wheelchair, and he is one of the happiest people I know. He has a wonderful family, good friends, and a strong faith, and that brings him joy.
As a person of faith, I believe that God can bring joy and happiness into our lives, even in the midst of difficult circumstances. I have seen it in my own life, and in the lives of those around me. When we focus on our limitations, we can become bitter and resentful, but when we focus on God's blessings, we can find happiness and peace. I think that's what the psalmist was saying in Psalm 126:1-2, that God can turn our mourning into dancing and our sorrow into joy.
In my own life, I have experienced periods of suffering, including severe migraines and broken bones, but I have learned to focus on the good things in my life, rather than my limitations. I have a wonderful family, a loving wife, and two great kids, and that brings me joy. I also have a passion for baseball, and I love watching the Chicago Cubs play. I believe that happiness is a choice, and that we can choose to focus on the good things in our life, rather than our limitations. So, to answer your question, I believe that you can still be happy if you're stuck in a wheelchair, but it will require a choice to focus on the blessings in your life, rather than your limitations.