Two lines are all Rich Mansfield gives us, and they pack in a surprisingly big idea: the feeling of standing at a moral crossroads and not knowing which way you'll fall. The speaker pictures good and bad as a line on the ground, something you can physically stand on, rather than two distant places far apart.
What stands out is how calm and honest the second line is. "I could go either way in the end" isn't a cry for help or a boast. The speaker simply admits that nothing is settled. There's no claim to be a good person, and no confession of being a bad one. The words "in the end" suggest the outcome is still ahead, and that the speaker senses real stakes in it.
The mood is tense but quiet. It feels like holding your breath. The poem's shortness adds to this, since it stops right at the edge, leaving the reader to wonder which way the speaker will step.