If you read the notes in the album booklet it explain a lot about this song specifically - it's about Jamey's vices he allowed himself to fall into, and the apathy he felt for everything in the year or so before this album was released.
The whole album is effectively about him overe-coming his personal demons to regain his motivation and love for what he does, and this specific song is about him rejecting his old self. The 'defeatist' in "Defeatist, you and I will never be the same" is himself a year or so ago.
If you read the notes in the album booklet it explain a lot about this song specifically - it's about Jamey's vices he allowed himself to fall into, and the apathy he felt for everything in the year or so before this album was released.
The whole album is effectively about him overe-coming his personal demons to regain his motivation and love for what he does, and this specific song is about him rejecting his old self. The 'defeatist' in "Defeatist, you and I will never be the same" is himself a year or so ago.