All in Being Called

When the Lord gives us a specific calling or mission that He wants us to accomplish, how do we know when it, or our part in it, is complete? Have you ever left spiritual business unfinished because you took your eyes off the Lord? Whether it is praying for someone each day, being a loving spouse, serving in a far-off land, or simply mowing the yard for a sick neighbor; when does stopping what we were once called to do become a matter of God’s will, as opposed to our own reluctance, fear, or lack of desire to continue on?