It is truth that makes us free, for all error is bondage. If, then, you would be free men, grasp the truth tenaciously, bravely, calmly; bind it round you as a girdle, treasure it in your heart of hearts. “Buy the truth and sell it not;” that is, get it at any cost, part with it never. Error is sin, for which every man shall give an account to God; and sin is no mischance or misfortune that claims pity only, but not condemnation or punishment; else what means the fiery law? What means the cross of the sin-bearer? What means the great white throne? What means the everlasting fire? . . .
   Let neither your words nor your lives give any uncertain sound. Every man to whom the Bible comes is responsible for believing all the truth which the revelation proclaims, and for rejecting all the error which it condemns. Cleave, then, to the Word of the living God; and sit, as teachable disciples, at the feet of Him who has said, “Learn of me.”

—Horatius Bonar, Christ Is All, ed. Michael A. G. Haykin & Darrin R. Brooker (Reformation Heritage Books, 2007), 109–110.