Carrying Stones

I read this excerpt from Keller's "The Prodigal God" attributed to Elizabeth Elliot (the story is apocryphal and not found in the Bible).

I felt convicted and driven to prayer.

"One day Jesus said to his disciples: "I'd like you to carry a stone for Me." He didn't give any explanation. So the disciples looked around for a stone to carry, and Peter, being the practical sort, sought out the smallest stone he could possibly find. After all, Jesus didn't give any regulations for weights and size! So he put it in his pocket. Jesus then said: "Follow me." He led them on a journey. About noontime Jesus had everyone sit down. He waved his hands and all the stones turned to bread. He said, "Now it's time for lunch." In a few seconds, Peter's lunch was over. When lunch was done Jesus told them to stand up. He said again, "I'd like you to carry a stone for Me." This time Peter said, "Aha! Now I get it!" So he looked around and saw a small boulder. He hoisted it on his back and it was painful, it made him stagger. But he said, "I can't wait for supper." Jesus then said: "Follow Me." He led them on a journey, with Peter barely being able to keep up. Around supper time Jesus led them to the side of a river. He said, "Now everyone throw your stones into the water." They did. The he said, "Follow Me," and began to walk. Peter and the others looked at hi dumbfounded. Jesus sighed and said, "Don't you remember what I asked you to do? Who were you carrying the stone for?"

So, I wonder, today, who do I carry this stone for? How about in my career?