He could not convince the Union army. He did not find it completely necessary.
Step one collecting and processing the recyclables
I don't know if you're referring to the empty box when texting, but it represents a character or emoji that your device is not capable of processing. For example, Apple devices have emojis that Android devices can't process, so Android users see that box (square).
It liberates us. Knowledge gives us the ability to survive and thrive in the world. This is freedom, and you can't have real power without freedom. More knowledge makes us better able to make decisions, as well as to decide the logical and ethical grounds on which we want to be making our decisions.