When was the last time someone asked you about Christian Science and you felt uneasy with the question? Or perhaps you welcomed the opportunity to talk, but the right words could not be found. You thought long after the opportune moment had gone, I wish I had thought of that point earlier.
To me, the "light" spoken of by Jesus is the illumination of thought through the Christ-idea we express. I was able to live my religion more openly, allowing the "light" of spiritual sense to direct my actions.
There are times when all of our study, prayer, and preparation seem to leave us when we're called on to communicate Christian Science to others. That's when we discover we're actually being called on to put into practice the very truths of God and man that we want to communicate.