Horatius Bonar addresses the confusion and instability in contemporary theology, emphasizing the overwhelming number of changing opinions and doctrines that can lead believers astray. He warns against the allure of novelty and the dangers of fickle minds that easily shift from one belief to another without a firm foundation in truth. Bonar stresses the importance of a tender conscience and reliance on God's unchanging Word for guidance, rather than succumbing to the whims of popular opinion. He encourages believers to seek wisdom from God and to trust in the eternal truths of Scripture amidst the chaos of modern thought.

C.H. Spurgeon addresses the current religious perils, emphasizing the danger of good men failing to discern subtle errors within their teachings. He warns against the complicity of believers with those who promote the Restoration delusion, highlighting that even a slight drift towards error can lead to significant consequences. Spurgeon stresses the importance of presenting the full truth of the Gospel, including the reality of divine justice and the final separation of the righteous and the wicked. He cautions that the omission of these critical truths can inadvertently promote dangerous errors, particularly the belief in universal salvation. The sermon serves as a call to vigilance and clarity in preaching the whole counsel of God.

Horatius Bonar emphasizes the necessity of true spiritual discernment, urging believers not to confuse error with truth for the sake of charity. He warns against praising earnestness in error, highlighting that true earnestness must be rooted in truth, which is pleasing to God. Bonar calls for a clear distinction between good and evil, true and false, and critiques the modern notion of 'liberality' that blurs these lines. He reminds the congregation that discernment is a Christian grace that should be actively sought, as all error misrepresents God's character. Ultimately, Bonar stresses that truth holds immense value in God's eyes, regardless of human perception.