Part 1
Having no real direction of its own in this life... a wandering mind is incapable of recognizing the difference between finding the promise of (another) false purpose to live for, and the pit into which it falls... as its tempted to reach for the treasure it imagines it has found there.
Part 2
What is not does not exist without having first imagined what should be, while what is neither requires, nor needs to leave anything to imagination.