JI just learn this wordterm from my friend’s post.

And I have also checked a few articles from ithe Internet as well.

After knowlearning more details about this illness.

My personal comment would be that we all have this OCD.

More common is "personal opinion".

But some people's condition might be so serious, hence they need a doctor’s help.

Or "...so serious they require a doctor's help."

Some people may be having that in slightlyonly have a minor case.

In fact, I saw some friends around me they all have thatsaid they have OCD behaviors.

There's a mismatch between "some" and "all". More typical would be "they have OCD tendencies", or even the colloquial "...they are a bit OCD".

But they all consider ithat is a “normal”.

Our “mind” power is theour most powerful weapon.

This is correct, but it doesn't match the context: using our mind as a "weapon" is not related to OCD. Consider "tool" instead of "weapon".

If we control that wellour mind, we can become so successful in many ways.

But if we losse control, it will backfire ourselves.

YDo you want to dance with the devil?

JI just learned this word from my friend’s post.

And I also checked it out on a few articles from internet as well.

I think this is what you mean; you did some research on it from the internet, right?

After knowing more detail about this illness.,

My personal commentopinion would be that we all have this OCD.

Your opinion is that all people have OCD at least a little bit, right?

But for some people, it might be somore serious, hence they need doctor’s helpand therefor they need help from a doctor.

Some people may be having that in slightlyhave OCD symptoms, but they are less serious than people with OCD.

by adding the last part, you can make it more clear that you are comparing them with people who have OCD

In fact, I saw some friends around men many of my friends, I notice that they all have thatsome OCD behaviors.

But they all consider that is aem to be “normal”.

If we control thait well, we can become soachieve success in many ways.

But if we loss control, it will backfire ourselven us.

You want to dance with the devil?

I don't think that this idiom is appropriate here. What do you mean to say?