Here is the poem by Hafiz:

Castrating an Ego

The only problem with not castrating
A gigantic ego is

That it will surely become amorous
And father
A hundred screaming ideas and kids

Who will then all quickly grow up
And skillfully proceed

To run up every imaginable debt
And complication of which your brain
Can conceive.

This would concern normal parents
And any seekers of freedom

And the local merchants nearby
As well.

They could very easily become forced
To disturb your peace;

All those worries and bills could turn to
Wailing ghosts.

The only problem with not lassoing
A runaway ego is

You won’t have much desire to sing
In this sweet
World.

Some science articles that show how we perceive continuity and permanence in our perceptions despite that they are not:

Auditory Illusion: How Our Brains Can Fill in the Gaps to Create Continuous Sound (Nov. 27, 2009)
http://www.sciencedaily.com/releases/2009/11/091125134655.htm

Now You See It, Now You Know You See It (Dec. 21, 2009)
http://www.sciencedaily.com­ /releases/2009/11/091130131329.htm

More Than Meets The Eye (Oct. 10, 2006)
http://www.sciencedaily.com­ /releases/2006/10/061009031340.htm

Why Does The World Appear Stable While Our Eyes Move? (Feb. 18, 2008)
http://www.sciencedaily.com­ /releases/2008/02/080215103316.htm

New Study Suggests The Brain Predicts What Eyes In Motion Will See (Aug. 29, 2009)
http://www.sciencedaily.com­ /releases/2009/08/090825112834.htm