Music - Arcanum Arcanorum?

Music has been my oldest friend (other than my parents). I cannot bring back a day in my memory book without its presence, in one or more of its countless forms.
And at times I wonder, and think, and muse, without a shred of an answer expected.
How, in that first century, the Christians huddled around this thing in order to aid in enhancing the existence of a new, a wondrous expression of Faith.
How, during a period formed between two walls of madness we call War, soldiers on the opposing sides were photographed, some with arms entwined or around shoulders, singing Christmas carols, then resuming the madness of killing.
How the tune, Lili Marlene was heard and sung by the opposing sides; sung both in German and in English, and sung many times during the same conflict over a period of years.
How the tune "Happy Days Are Here Again" was sung in both Roosevelt's and Hitler's presence, each in its respective language, before the carnage of World War II.
How, on April 29, 1945, after Adolf Hitler married his mistress Eva Braun, the new Mrs. Hitler had brought in the only record available in the final turmoil of the bunker; a tune called "Red Roses", which was played during the ceremony - just hours before their suicide.
There is no way to reason such events.
Other than to be contemplative about this most arcane of Man's languages.