“Everything came from something else. Each one of us is the accumulation and culmination of everything we’ve ever seen. Embrace it. Stop worrying about being original. You just have to be authentic.” As usual, this article from MusicBed’s blog is an excellent read.
As my dad used to say, “no idea is original.” Which sounds disappointing, but I don’t think it is, actually. I think the question is, how do you put across that idea? It’s all in the execution.
Oh, and perhaps the most fundamental takeaway from this article: DON’T PLAGIARIZE.