It Happened Again

I visited Fallingwater with a group from the museum I work for now--which I love, by the way--and I walked through the hallway into the master bedroom and--it happened again--was moved to tears. I planned on going on onto the terrace and looking in (my favorite nighttime view) but I never made it. I just stood in the room looking out. I can't explain it. Can someone help me? My profession is based on putting beauty into words, but this I cannot.