It's difficult to put into words. It's the absence of all logic and reason, it's the sensation of not knowing a single thing that's happening with your emotions, yet you push forward. To quote Ted Mosby, it's the best thing we do. I can't describe it for everyone, but I know that it makes you feel everything in extremes. You don't just feel joy, you feel utter and total bliss. You don't just feel sadness, you feel a deep and profound hollowness. It's the most beautiful, painful thing.