Interviewed in 2014, the song's vocalist Justin Hayward said:

I think To Our Children’s Children’s Children [1969] is the one Moodies album that didn't come across on the radio. It didn't jump; it was soft, it was quiet. Everybody was so delicate with it and handling it with kid gloves. The way it was mastered was quiet, and the way it was transferred to disc was delicate. In the end, it ended up getting a little lost. Watching and Waiting — when we heard that song in its studio beauty, we thought, "This is it! All of those people who had been saying to us for the past 3 or 4 years, "You'll probably just do another Nights in White Satin with it" — no! We had shivers up the spine, and that kind of stuff. But when it came out and you heard it on the radio, you kept saying, "Turn it up! Turn it up!! Oh no, it’s not going to make it." So it didn’t happen.

(wikipedia)

For the recent post, Mr. good to hear your wife is doing better and communicating well. You are blessed for being with her for 47 years.