You think you understand everything that goes around you. Do you know that just as you could see something different than how someone else could see it, you could understand things different than others do? See the problem with this world is that we don't have a world reference everyone could go to. People react, think, shout and scream, each because of a different reason. They didn't have the same day as you had, and they don't live your same life.
Kids see another perspective, too. If you watch a movie and they do, wait till the end of it and ask them to instruct the story, you won't believe. Half of the scenes they didn't catch, and the other half they didn't quite comprehend.

How strange is a brain? It transcribes and decodes. You shout one word for days and wonder why the other person never seems to perceive. You never see their brain, you never see their heart too. So if you love to speak, you could speak your heart, but a brain can't seem to speak for its own self. Your conscious asks why, your unconscious knows why. Shut the conscious and listen to your whispering unconscious. Your unconscious is your dreams, check them if you need to speak.
Your conscious is rational and your unconscious is emotional. Your conscious is what keeps your current moment going, your unconscious is responsible for your whole life back and forth. That's why the more feelings you have to something, the more it impacts you, the more it affects you. You don't get to teach a brain by stating, you get to teach it by linking it to an emotion. You don't succeed when you tell yourself everyday you're successful, you only succeed when you remember a moment that you've been mostly feeling successful or a word that once aroused success in you.What's life like? It's like a book you once read and really liked. Then came a friend and asked you to inquire 'em. Can you narrate? You can't even seem to get it to complete. Your brain works for you and ironically is responsible for how you work. You'll most likely end it, "if I tell you, you won't quite comprehend it. You must read it yourself, see for yourself, and envision." They might like it, they might not, you can't change that.
So why do you always try? If someone doesn't seem to fully understand life, you don't try they won't get it. They didn't read enough, teach themselves enough, experience major moments, take life chances or even bear a crashed crisis. They live on majoring the minors and taking life the elementary way.
Fortunately though, only one brain is ready to know the difference of an apprehended life or an empty one. A brain that's willing to change itself.