Samuel Logan Brengle emphasizes the importance of prioritizing heavenly things over earthly concerns, as exemplified by Jesus' teachings and the angels' song at Bethlehem. He urges believers to seek God's glory first, which leads to a life of peace, goodwill, and a commitment to fighting sin. Brengle highlights that true brotherhood among men can only exist when they recognize God's Fatherhood, and that love for God fosters love for others. He calls for a spirit of humility and peace, encouraging individuals to pray for leaders and work towards harmony in their communities. Ultimately, Brengle asserts that the fulfillment of the angels' song of peace hinges on our dedication to glorifying God and embodying His spirit in our lives.