Related:

• Matter cannot be created or destroyed, nor can it be returned without a receipt.
• Mass-energy cannot be created or destroyed. It CAN, however, be wasted.
• Anvari's Law of Homework: A homework doesn't get created or destroyed, but can be converted from one form to another.
• Just as there are laws of Conservation of Matter and Energy, so there are in fact Laws of Conservation of Pain and Joy.
  Neither can ever be created or destroyed. But one can be converted into the other....
• Screw up your life! You've screwed everything else up.