An old favorite, Steve Winwood wrote this song. Blind Faith with Winwood on vocals, recorded and released the song in 1969. Others covered it multiple times. I like this live version from Guitar Crossroads, with Steve Winwood, Eric Clapton, Derek Trucks and Doyle Bramhill.

It’s a good walking song, and easy to sing in your head. Enjoy.

https://www.youtube.com/watch?v=VT-SFgkVlno