Paul says invest in others. Look for others who want to grow. Invest in them the same way that others invested in you. We need you to grow. We need you to grow not just for your sake, but so that you can invest in others. You only need to be one step ahead. That's all it takes, and you can make an eternal difference in the life of someone else.
Mark Clark deals with the intellectual issues, but he deals with practical ones too: how often sex should happen in marriage, for instance, and, in brief, how to deal with those wrestling with divorce, sexually transmitted infections, rape, unfaithfulness, pornography and gender confusion. He shows how God's commands are good and designed to maximize our pleasure.