On the cold and drizzly afternoon of Sunday, April 15, 2018, Rev. Dr. Jim Sherblom lectured about “Transcendentalism in the 21st century” to a packed, standing room only, crowd at the new Walden Pond Visitor Center.  He spoke about experiencing reality bounded by our senses alone, or guided by reason, intuition, and ultimately unknowable mystery. Jim then led the crowd on a journey of the imagination along the Old Carlisle Road in Estabrook Woods, into the wildness of the Great Meadows National Wildlife Refuge, paddling along parts of the Assabet, Sudbury, and Concord rivers, and finally from Concord village along the Emerson-Thoreau Amble to Henry David Thoreau at Walden Pond. Along the way Jim indicated where archeologists have found artifacts from indigenous people in the fields of the Old Manse, and along the Reformatory Branch Trail where there was a campground of the Nipmuc tribe of the Algonquin nation (yielding Concord’s oldest artifacts at 11,000 years old).  Their imaginative amble crossed over Nashawtuc Hill, walking in Tahatawan’s footsteps, and out to Egg Rock, before circling …