During that time (late 60’s early 70’s), it was common for popular music to have a clearly Christian perspective or topic. Broadway shows such as Godspell and Jesus Christ Superstar made a ton of money.
This ambiguous lyric by The Who may have been influenced by the lucrative style of the day.
Pete Townshend was a follower of Meher Baba, (that’s where the “Baba” from “Baba O’Reilly” came from).