The line, " Silence legion, save your precious,silence, just stay out of my way!!!!..."

Legion was a demon encountered by Christ in the gospel of Mark, comprised of two-thousand or so spirits. Christ apparently drives Legion out of the man it possessed and into a herd of swine that immediately leapt off a cliff into the sea, but it's all sort of ambiguous.

a possible interpretation of what maynard is singin about. He is banishing his demons for the sake of his son's survival and his own.