Cain did his worship for selfish motives. Hence why it wasn’t accepted. His focus wasn’t in the right place. Which is what I”m referring to. If an organists focus isn’t in the right place, it’s still as much as a diservice to God as an electric guitarists focus being in the wrong. I mean, music evolves. Wasn’t hymn music developed from Bar-room music?
NO, NO, NO!!! :) This is an urban legend that started because someone didn't know anything about musical notation and made an incorrect assumption, probably in trying to prove a false point. Bar music is actually a form of music notation and not a reference to "tavern". Click here for an article debunking that hoax.
Cain’s sacrifice wasn’t accepted for the same reason our “good works” aren’t accepted. His motives and focus were only part of the problem. Even if he had pure motives and his total focus had been on God, His sacrifice would not have been acceptable.
I said nothing about the style of music. I’m more concerned with tone and content than instrumentation. There’s nothing in Scripture about organs and pianos. I think most belivers know when something glorifies Christ and when it doesn’t.
Think of Aaron’s sons Nadad and Abihu. They were cut down for offering “strange fire” before the Lord. Then Moses said to Aaron, “It is what the Lord spoke, saying, ‘By those who come near Me I will be treated as holy, and before all the people I will be honored.’”
In the end worship isn’t about what we like. It must be about what He wants and likes.
“God is a Spirit: and they that worship him must worship him in spirit and in truth.” (John 4:23)