The hymn is sung to the tune "Vater unser." Here's the second musical phrase:
In the first verse, the text here is "Bids all of us to live in love" (the subject is "Our Father" from the previous line). The phrase "all of us" is sung to the notes G F Bb.
In the seventh verse, the text, describing temptation, is "Where our grim foe and all his horde" (the sense carries over into the next line: "Would vex our souls on ev'ry hand"). Here, the phrase "all his horde" is sung to the notes Eb F G.
Here's the fifth musical phrase:
In the fourth verse, the text here is "Curb flesh and blood and ev'ry ill," and the phrase "ev'ry ill" is sung to the notes G F Eb.

