What are "Good Vibrations"?

In a 2004 Rolling Stone interview, Brian Wilson tells the story of how the word 'vibrations,' scared him as a child. His mother, Audree, was explaining to him why dogs barked at some people and not others. Brian reiterates how, "A dog would pick up vibrations from these people that you can't see but you can feel. And the same thing happened with people." This bit of wisdom inspired what was to become one of Brian's song-writing and production masterful achievements, "Good Vibrations." Brian also says, "This is a very spiritual song, and I want it to give off good vibrations."