Ken Carter has an excellent post here about the downsides of single-mindedness and the advantages of “living in more than one world.” He says:
Living in more than one world allows us to meet a variety of people who enrich our lives. It prevents us from obsession with any one thing. We discover opportunities for development and learning in parallel pursuits than can then shape our professional leadership. We may discover that we are contributing to the world in ways that may not be possible in our employment… If we live in more than one world, we are better able to withstand the inevitable setbacks and disappointments that occur in our lives.
“I lack nothing…my cup overflows.” (Ps. 23:1,5)