Last Sunday I preached on 1 Cor 7:17-24. The title of the message is "The Primary Versus The Secondary." In essence, Christ is primary; our circumstances are secondary. As we take into ourselves who Christ is, what he has done for us, who we are in him, and what we have in him, our lives can be profoundly transformed.
Both the audio and a PDF of that message are available on the "Sermons" page of the ECLEA website: http://www.eclea.net/sermons.html