Memes are units of culture passed on from one person to the other. They are symbols, rules, ways of acting that make us who we are. Memes are the software that works on our human hardware. Example: kids will mimic behavior that strikes them as funny or interesting. This is the passing of a meme.
Sometimes memes are of a scope much larger than any one person could convey. Religions are a form of meme that has outgrown the individual. Since its inception, Christianity has been adapted and changed to maintain itself in the human consciousness (as have all other successful religions). It's current inception holds this basic belief worldwide: Christ is Love. Not the romantic kind, or just between friends, where the mutual benefits are obvious. This love transcends differences, and is between yourself and others whom you may or may not know.
I am not a big fan of the old testament as a way in which to live your life, nor much into prophecy. But the idea of 'love' overcoming all boundaries has practical applications in the modern world.