Why do people have Buddha nature and demon nature in their hearts?

The nature of Buddha is knowing and being good, while the nature of devil is being ignorant and being good.

This is just a name of knowing and not knowing.

For example, if you know there is a trap ahead, you won't avoid it.

There is a trap in front of ignorance, and you will walk over and hurt yourself.

For example, knowing that there is a mouthful of rice in front of you, knowing that you can eat enough and be kind to yourself.

There is food before ignorance. If you don't know how to eat, you will starve yourself and hurt yourself.

You have to understand what is good first.

Kindness means being kind to yourself.

Stone has no self, so it has no ability to be kind to itself.

Trees don't treat themselves well, so they grow up and have their own concepts or selves.

Being kind, the independent ability of all actions, is a manifestation of being kind to yourself and satisfying your own needs and ideas.

Therefore, without good things, there is no concept of self, and you can't improve and grow yourself independently.

This is the origin and the beginning of goodness.

Good means not hurting yourself, no matter what form.

The act of hurting yourself, allowing the outside world to hurt yourself or do something by yourself, is returned to you by the outside world.

Either knowing the injury or not knowing that the injury is your own injury.

Therefore, goodness needs to be constantly improved, perfected and treated completely, which is also the reason why many people learn, practice and give good deeds.

Some people say that impulse is the devil's visible impulse, that is, to do something that makes you feel overwhelmed.

This is why the devil is ignorant.