"Low class is in the way you talk, it’s the way you dress, it’s the obvious understanding that more intelligent people have when they start talking to you and realize that you don’t have an open mind.
If you are low class, you won’t know what low class is.
If you are truly high class, you won’t waste your time with low class because you have already crossed that bridge.
But if you think you are high class, you won’t really know the difference."
This quote is so ambiguous that I can’t catch it. Please make it clearer or paraphrase it if possible. Many thanks.