You are in possession of the most complex (and coolest) thing we know of in our universe: a human brain. Its collection of about 100 billion (!) neurons and about 500 trillion (!!) synapses is somehow capable of thought, emotion, self-awareness and other magic. You have a miracle in your head. So respect it, and treat it well. Nourish it with healthy beliefs, thoughts and ideas. Wear a helmet when you go biking. Avoid addictive substances and destructive memes. And don't ever give control of it to anyone.