I certainly did not know that! No wonder it sounds so sincere. I know it’s just a performance, but there is something about the quality of that song is quite effective.
Of course, the choirs in the chorus help.
Whoever is playing the piano, really knows what they’re doing. Those light, loose flourishes at the end of each line of the verse sound casual, but they are not.
The piano in this song was arranged and performed by Rick Wakeman. Here is his instrumental version of the song:
I saw an interesting analysis of Wakeman’s piano work on that song just the other day. What he does is pretty sophisticated.
https://www.youtube.com/watch?v=yQg2tNur2bw