are you a witness?

I am sitting here thinking about soul winning, thinking about the privilege and the honor given to us believers to tell someone about Jesus.  The last 3 days I was wondering why do I feel so yucky?  why do I feel depressed?  God gave me the answer from an international call, from a place thousands of miles away from home.  A brother in Christ was sharing his testimony of how he and his wife went to a hotel, and his wife handed a muslim worker a tract called "This was your life," he said a few days later the muslim hotel worker came to their church and sought him and his wife, and she was shaking and ask for help to know this person Christ.  After our conversation, I received renewed strength and energy because I was again reminded, I am a witness and the reason of my feeling down is not doing my job.