Ever have a dream when you wondered in the midst of it whether or not you were dreaming? Lucid dreaming is a skill you can acquire, and it's fun!
Knowing that if you're "just" dreaming, you can rewrite the scary parts (I've sometimes actually rewinded the dream1) and enhance the happy parts: run faster, jump higher, laugh your head off; summon guides, travel through time, read minds; levitate, manifest, do the impossible?
But then, you think to yourself, "Maybe this just can't be a dream, it's way too real."
Lucid dreams can teach us a lot about this reality...
Yeah, you're having one right now.