Put a little knot in my throat...

I just read the following passage from Encyclopedia of an Ordinary Life, "A friend once told me a story about how he was going through his five-year-old son's backpack and he found a picture of a little boy standing under a rainbow crying. His first thought was Oh God, my son is having serious problems. When he asked his son about the picture, he told him that he had been playing at school and he saw a rainbow and it was so beautiful that it made him cry." (cut to me and my eyes welling up)