Never say never, but I\\\'m gonna

I begin with "I'll never be successful".
I'll never see mount Everest. I'll never be peaceful. I'll never be at rest.
Hold the phone.
Never say never, but I'm gonna.
I'll never be positive. I'll never be happy.
I'll never be supportive. I'll never have the key.
This isn't like you. Change it up.
Fine! Never say never, but I'm gonna.
I'll never hurt her. I'll never make her cry. I'll never see my child, waving goodbye.
Okay. I don't understand. What are you trying to say?
I'm saying never believe a lie.
That's it?
Yup. I'll always believe I'm capable. Never isn't forever. Nor is it true. All you need to do. Is believe in what's true.
Never say never, but I'm gonna.