It's cross to bear, bear in this case being used in the same sense it is in weight bearing, Greeks bearing gifts or even ball bearing. It refers back to the Biblical tale of Jesus carrying his cross to Golgotha.
Lookin' Out My Back Door. Lookin' Out My Back Door is a song recorded by the American band Creedence Clearwater Revival, also known as CCR. The song was written by the band's lead singer, guitarist, and songwriter, John Fogerty.
Behind Blue Eyes by The Who Songfacts. Pete Townshend originally wrote this about a character in his Lifehouse project, which was going to be a film similar to The Who's Tommy and Quadrophenia. Townshend never finished Lifehouse, but the songs ended up on the album Who's Next.