Maybe you are right, and this world isn't anything special after all.
But as familiar sights look different when seen from on high--as even when it's raining, blue skies spread out above the clouds--don't you think that the way you view the world changes depending on how it is perceived?
O, what a wonderful world! Even if it's a lie, if you believe it, maybe you'll feel happier than yesterday. Right?
Good or bad or something amazing: it isn't about what you do; it's about living without regret. That's it.