Lessons:
Silence is golden because you can't hear gold.

Yet another bad combination:  Rich and famous yet childish and aimless.

It is much more difficult to vanish into thin air than into an air of average thickness.

When asked "What part of no don't you understand?" Your response should be "What part of homophone don't you understand?"

People that get mad when someone wastes food don't understand the concept of digestion.