Lists of things that help you understand

Things that people do

- Tell you the current situation 

- Tell you what might happen

- Do things

- Tell you how things work

- Tell you how things could work better

- Create new things

Quote from American Sniper

There are 3 types of people in the world, sheep, wolves and sheep dogs. Which one do you want to be?

Scientists discover it, understand it and imagine uses for it, engineers build it. The rest of us operate it. Anything else is either nature or bullshit.