In a Christmas card this year, I learned of the death of an old friend that was very influential to me when I was a teenager. I hadn't spoken to him in at least a decade. With some hesitation, I wrote his widow about how much impact his generous gift of his time and his friendship had on me. She wrote back a very thoughtful and gracious note saying she was saving the note to share with their young children when they were younger. So a positive ending, but I still wish I had done that when he was still with us. If this thread brings anyone in your life to mind immediately, don't wait. Give them that feedback while it's with you.