Homophone mood

Today I am mostly not.
Because my brain is in a knot
Can I really write?
When I do not feel right?
With words that sound the same

A simple error can undo
the poem I do write
And when discussed
Some show disgust
to show what isn't right

I could Mistake and say a word

That isn't spelt that way

For their and there

A grammar snare

From words that sound the same

* a homophone is a word that sounds the same but is spelt different, the favourite being 'there' and 'their