Good energy

Good energy to all of you.
This is a very naive post. I usually do a lot of research on a subject that interests me, from vagal reflex to Britney's performance but this time the subject of good energy/bad energy comes to my mind. I don't need to do research...the truth is that I don't want to. Because it is something very basic yet very complicated, there's not one single area in which the concept of energy or opposites doesn't apply. It can get very messy to explain it.
Since childhood I've heard stories where the bad witch creates a potion or spell to harm somebody, only to discover that by some law of the universe all the harm she intended for another person, comes back to her; seven times more powerful. I don't remember the name of the story, and maybe it was something my grandma came up with.
In something so basic and ridiculous as that story as example, let me say: If there is a bad witch, so there must be a "good witch" or a good side or a good energy.
The bad witch can be called "bad" because she is not good. And the other witch or side can be called "good" because it's not bad. From there I understand that those two concepts give meaning to each other. So the existence of both is absolutely necessary for the world to work.
Well, I've been asking myself the question, Which one is stronger? Good or Bad?
In human interactions, which one is stronger? A cheery person in a room? Or the one that tries to make our lives miserable?
In biotechnology, Are there more things that make our lives better? or Are there more things that could destroy us?
I want to think that good is stronger. But again, it all depends on the context.








