The most melancholy of the exemplifications of the effect of ignorance, as constituting an incapacity for receiving religious instruction, have been presented to those who have visited persons thus devoid of knowledge in sickness and the approach to death. Supposing them to manifest alarm and solicitude, it is deplorable to see how powerless their understandings are, for any distinct conception of what, or why, it is that they fear, or regret, or desire. The objects of their apprehension come round them as vague forms of darkness, instead of distinctly exhibited dangers and foes, which they might steadily contemplate, and think how to escape or encounter. And how little does the benevolent instructor find it possible for him to do, when he applies his mind to the painful task of reducing this gloomy confused vision to the plain defined truth of their unhappy situation, set in order before their eyes. He deems it necessary to speak of the most elementary principles--the perfect holiness and justice of God--the corresponding holiness and the all-comprehending extent of his law, appointed to his creatures--the absolute duty of conformity to it in every act, word, and thought--the necessary condemnation consequent on failure--the dreadful evil, therefore, of sin, both in its principle and consequences. God--perfect holiness--justice--law--universal conformity--sin--condemnation! Alas! the hapless auditor has no such sense of the force of terms, and no such analogical ideas, as to furnish the medium for conveying these representations to his understanding. He never had, at any time; and now there may be in his mind all the additional confusion, and incapacity of fixed attention, arising from pain, debility, and sleeplessness. All this therefore passes before him with a tenebrious glimmer; like lightning faintly penetrating to a man behind a thick black curtain.