Sphere

Is this grammatically correct?

I can hear words unsaid

Each gesture speaks loud

You really think you are strong

But your moves show the opposite

Let me tell you something clear

I don't need to justify anything, never

If I no longer want you in my life

It is a point of no return in that sphere

Leave now and let the door open

And please call next in the line

Your substitute will find time for life

And you won't die, that's fine