A.B. Simpson emphasizes the necessity for those who fight the Lord's battles to forsake the desire for human approval and praise, warning that such motives can lead to spiritual weakness. He encourages believers to embrace the solitary path of walking closely with God, recognizing that true strength comes from divine approval rather than human sympathy. Simpson highlights the danger of confusing earthly affection with genuine brotherly love, urging Christians to find solace in God's understanding rather than in the fleeting opinions of others.