Horatius Bonar emphasizes God's divine jealousy for truth, as expressed in Jeremiah 5:3, where the Lord laments the absence of truth among His people. He asserts that God's watchful, discerning, and just eyes are always upon the truth, condemning falsehood in all its forms. Bonar explains that there is one universal standard of truth, which is the Bible, and that God demands belief in this truth rather than speculation. He warns against the laxity of thought in contemporary society, urging individuals to align their beliefs with God's unwavering standard. Ultimately, Bonar calls for a commitment to truth, reminding us that God's judgment will elevate truth and shame error on the day of the Lord.