What if we were just some other person's dream?
And I don't mean there's us in a normally waking state that is dreaming itself, but what if we were some completely random other person's dream?
And then we'd know that nothing could ever matter, because the moment that that person wakes up, we're gone.
Best piece of advice never taken. If he went fishing, he would still be alive today. So when someone tells you to quit and go fishing, you should take him very seriously. 24 hours later , since of that sentence , he was gone.