“Now when the sun was going down, a deep sleep fell upon Abram; and behold, horror and great darkness fell upon him” (Genesis 15:12 NKJV)

After Abram (His name before God changed it to “Abraham” – “Father of nations”) had divided the sacrificial animals and arranged them according to God’s instruction, a great sense of “horror” came over him with the setting of the sun. God was approaching. One commentator has observed, “Holy fear prepares the soul for holy joy; God humbles first, then lifts up.” This meeting with God was preceded by Abram’s questioning of God’s promised seed. Abraham had questioned, “Lord God, what will You give me, seeing I go childless?”
Have you ever spent the night in prayer questioning God and waiting for an answer? If you have, you may have experienced what Abram did, holy terror. God let the hem of His holiness touch Abram and it was enough to horrify. Then, God made a covenant (Literally “cut” a covenant, as the origin of the word covenant implied the shedding of blood to seal it.) with Abram by passing between the sacrificed animals, prophesying his offspring’s slavery in Egypt and God’s deliverance. When the sun arose the next morning, Abram’s questioning and terror had been replaced with faith and holy joy.