Lyric discussion by BDoug52 

Cover art for Dear Diary lyrics by Moody Blues, The

It brings home the endless state of the lives of most people, being so caught up in day-in, day-out trivia of life that we can't see, or choose not to see, the world around us. It's still the same today, were letting our precious freedoms be usurped in the name of "the greater good." As a retired man with estranged children & 3 divorces under his belt, I'm not so caught in the lives of a spouse, children, grandchildren, etc., that I don't have time to ruminate over the state of our world. Most of us, however, let ourselves be so caught up in distraction that the world could be burning down & we'd not concern ourselves with it. Ray writes of a self-absorbed person so caught up in the rat trap that he pays no attention, even of the explosion of a hydrogen bomb, which, in the 60's, was big news, recording for posterity his inane & meaningless daily life.

[Edit: Further thoughts. ]

@BDoug52 I wholeheartedly agree with your explanation of the lyrics. The meaningful yet meaningless lives. Sending sunshine from Florida ๐ŸŒž