Truth one:
The possibility something in your system will break is directly proportional to the length of time before the visitor arrives, their importance, and the distance they traveled.
Truth two:
If the system does not break, your library of 6000 LP's does NOT contain the music requested by your guest.
Truth three:
If the system does not break and you have the visitors favorite music, the lights will go off in spite of clear blue skies and no bad weather in a 300 mile radius.
Truth four:
If none of the above occur, the guest will be in a chatty mood, speaking over the music with topics of furniture refinishing or how bad the roads are near his home.
Truth five:
If you have never suffered any of these, you are not a audiophile.