<p>4:20 <i>I so wish I could be present with you now and change my tone</i><i>, for I am in doubt about you</i><i>-</i> The idea is that Paul felt that if he were present with them, then he would be able to change his upbraiding tone towards them because he would successfully persuade them to remain with grace rather than Judaism (see GNB). As noted on :18, Paul knew that his presence with them affected them positively. But if physical presence is required, then there is no depth of conviction. So many examples from church life flood to mind; of those who lived highly committed lives until influential figures passed off the scene, and then the commitment ended. It is only personal connection with the Lord Jesus which will provide lasting motivation right up until our last mortal breath.</p>