We need not to dwell upon the detailed promises, of which the covenant was the seal. They are simply the fuller expansion of those already made, but now confirmed by more solemn guarantees. The new relation of familiar friendship, established by the covenant itself, is the main thing. It was fitting that God's friend should be in the secret of His purposes. 'The servant knoweth not what his lord doeth,' but the friend does. And so we have here the assurance that faith will pierce to the discernment of much of the mind of God, which is hid from sense and the wisdom of this world. If we would know, we must believe. We may be 'men of God's counsel,' and see deeply into the realities of the present, and far ahead into what will then become the certainties of the future, if only we live by faith in the secret place of the Most High, and, like John, lean so close on the Master's bosom that we can hear His lowest whisper. Notice, too, the lessons of the smoking furnace and the blazing torch. They are like the pillar of fire and cloud. Darkness and light; a heart of fire and a wrapping of darkness,--these are not symbols of Israel and its checkered fate, as Dean Stanley thinks, but of the divine presence: they proclaim the double aspect of all divine manifestations, the double element in the divine nature. He can never be completely known; He is never completely hid. Ever does the lamp flame; ever around it the smoke wreathes. In all His self-revelation is 'the hiding of His power'; after all revelation He dwelleth 'in the thick darkness.' Only the smoke is itself fire, but not illumined to our vision. The darkness is light inaccessible. Much that was 'smoke' to Abram has caught fire, and is 'light' to us. But these two elements will ever remain; and throughout eternity God will be unknown, and yet well known, pouring Himself in ever-growing radiance on our eyes, and yet 'the King invisible.' Nor is this all the teaching of the symbol. It speaks of that twofold aspect of the divine nature, by which to hearts that love He is gladsome light, and to unloving ones He is threatening darkness. As to the Israelites the pillar was light, and to the Egyptians darkness and terror; so the same God is joy to some, and dread to others. 'What maketh heaven, that maketh hell.' Light itself can become the source of pain the most exquisite, if the eye is diseased. God Himself cannot but be a torment to men who love darkness rather than light. Love and wrath, life and death, a God who pities and who cannot but judge, are solemnly proclaimed by that ancient symbol, and are plainly declared to us in the perfect revelation in Christ Jesus.