How far down do roots go?    What do bridges connect us to? Wha t benefit do es light have ?  These were a few of the questions that swirled in my head recently.     This past weekend we went and visited our son in southern Indiana. We spent one day walking and observing some very unique places in nature and another day in darkness . Roots: As we walked t hrough a park-like setting, we noticed a tree near a stream. I thought of how determined that tree was to reach the water from it's high bank.  It looked as though the grou nd had washed out beneath it, but it still held up and the bran ches had beautiful green leaves growing on them above. "For he shall be as a tree planted by the waters, and that spreadeth out her roots by the river, and shall not see when heat cometh, but her leaf shall be green; and shall not be careful in the year of drought, neither shall cease from yielding fruit. " (Jeremiah 17:8) I thought of how we are like