system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between energy attained from sleeping and energy attained from food?
gpt
You don't get energy from sleeping. Your body gets energy from food. What sleep does is repair damage to your body and allow your brain to rest. When your brain doesn't have enough rest, it stops working as efficiently. But without food, your body won't have enough energy to do anything.

Think of food as the gas you put into your car, and sleep as the occasional oil change you need to keep your car working properly.