O ye who complain about your calling or fret about the changes and trials of life, how do you know but that these very changes are the divine methods by which God's purposes of blessing and usefulness concerning you be fulfilled? Had Aquila not been compelled to leave Rome and break up his home and business, he would probably have never met with Paul, and been called to the knowledge and service of Christ through this providential meeting. Had he not been a working man, and pursuing his ordinary avocation he would not have been brought into contact with the apostle. It was in the line of their calling, their common duties, and the providential changes of their life that God called them. And so He meets us. Do not try hard to run away from it, but, as the apostle has so finely put it, "Let every man abide in the same calling wherein he is called, let him therein abide with God." Make the most of your incidental opportunities.