Andrew Bonar emphasizes the significance of companionship in ministry through the story of Jonathan and his unnamed Armour-bearer. He highlights that God often works through pairs, illustrating this with biblical examples, and suggests that working together not only strengthens faith but also fosters a sense of community and support. Bonar notes that the presence of another can enhance one's courage and effectiveness in spiritual endeavors, as seen in the victories achieved by Jonathan and his Armour-bearer. He encourages believers to recognize the importance of collaboration in their faith journeys, as it combats pride and promotes brotherly love.