Dark side: Make it Positive

I make you feel joyous,

I make you feel sad.

I make you feel tremendous,

All because of what you've had.

It's easy to baffle me,

To make you see what's a lie.

But I might stupefy you,

By thinking you are my.

Your speech might be eloquent,

But it might be mine.

I can inarticulate you in a second,

And make you unable to shine.

Although you can stop me,

With a calm and sharp mind.

But if, you are coincited,

You can't see me behind. 

I am your dark side,

An upcoming tide.

To control me all you do,

Take me to the other side!