Usually, if I was going to have a musical #TBT, I would post an old performance picture or video to social media and let that be.  Today, however,  I want to talk about a song -- a song from my past, a song that it seems is more foundational to everything I believe than I might have understood, even yesterday. I've been working on letting go of some things and some relationships in my life, things and people that perhaps I have held too close for too long.  Psychologists and theologians often agree that holding too tightly  to (or, as I like to say, making an idol of...) anything is…