Music in the air changes always

When i walked to libary, i heard music playing. Music in libary? Bit unusual, libary at least newspaper reading room is quiet place, if not to count sounds of people, of computers and noise of machine that appers to be either heater or condtioner. It was classical music, imagine Rock band in libary ;), though id put Queen to sing here, cause its classic and it rocks. And it was Mozarts music performed by some school children. It was a nice change, calming music. And then i was catching myself at thought that Mozarts music is Mozarts music because its performed at certain style, we have learned to be his music. true you can change something, but then would be something differnt, at least a bit. One wrong note or out tune instrument, and we say it aint the real thing. Same is with other things, songs thou you can change tune and keep the words. Then its same song in different variation. I like different interpretations of my favourite band Queen songs. There are at least 3-4 interpretaions of We Will Rock YOU, some of them are so funny, especially orchestra wersion by Max Raabe and one by some kid voices. Five+Brian May did excelent job too. But the point is that real thing means something we know :) Unaltered, same tune, same voice, same words. Because we are often not used to changes. Specially in ideas and people. But give us the time and knowledge that change is ok, then Bob is your uncle. Cause no person is what you think that person is always. That is unaltered. You cant step twice into same water says proverb. River is there but the water flows and changes. Always!