I don't hear voices anymore

I'm isolating, I've been alone for a while
Device creating, left alone and I smile
I used to think that there were people in my head
Excuse to drink I guess that's how I'm bread
Now the only voice that I hear is my own
Wow now I have a choice to persevere and I've grown
Schizophrenia, it's a b**** to say the least
I get low mania, well I switch to slay the beast
Now I have a plan to stand as tall as a tree
I thought I heard other voices but it was always just me