Thoughts ~

Well, there's probably many reasons, not just one.
But here is one of mine ~

Imagine walking smugly around, living a perfect second life,
no surprises or challenges, it would be pretty boring in the end. . . well, I think so.

There’d be nothing to aim for, no ambition, no achievement and no dreams.
No reason to be happy either, because happiness would be taken for
granted. How can someone be happy unless that same person can compare joy to
sadness?

No, the way I see it, is that you cannot take away the negative things in life and keep all the
emotions intact . . . if you take away the possibility of being hurt,
then you take away any chance of being able to understand another person's problems.
If it was possible to live one's life all over again, and by doing so remove the
errors and the heartaches that have been made the first time, you would become as
cold, egoistical, unfeeling and inhuman as a robot.

Anyway, that's the way I see it, at the moment.