Don’t Let the Old Man In is a song about staying strong and not giving up as we grow older. The lyrics encourage fighting against the challenges that come with age and keeping a youthful spirit.

's "Don't Let the Old Man In" lyrics proved to be perfect for Clint Eastwood. The actor's 2018 movie The Mule used the song and it hit hard, but maybe not as hard as it hit when Keith took to the ...