Do you remember when you were 10 or 11 years old and you really thought your folks were the best? They were completely omniscient and you took their word for everything. And then you got older and you went through this hideous age when suddenly they were the devil, they were bullies, and they didn't know anything.
If you knew that your life was merely a phase or short, short segment of your entire existence, how would you live? Knowing nothing 'real' was at risk, what would you do? You'd live a gigantic, bold, fun, dazzling life. You know you would. That's what the ghosts want us to do - all the exciting things they no longer can.