The Son Before Bethlehem
Christophanies are appearances of the pre-incarnate Christ in the OT. They show that the Messiah is not a new god but the same Yahweh who walked with His people.
Walking in the garden (Genesis 3:8)
The LORD God is described as walking in the garden—a human-like presence. After the fall, He promises the seed of the woman who will crush the serpent (Genesis 3:15)—the first gospel promise, pointing to Jesus.
The Angel of the Lord
In Exodus 3, the Angel of the Lord appears in the flame; then "God" calls to Moses from the bush. The Angel is identified with Yahweh (Exodus 3:4–6). In Judges 6, Gideon sees the Angel and fears he will die because he has seen the LORD face to face. This divine Angel is the Son in pre-incarnate form.
Melchizedek (Genesis 14; Psalm 110)
Melchizedek appears as king of Salem and priest of God Most High—without genealogy, "like the Son of God" (Hebrews 7:3). He blesses Abraham and receives a tithe. Psalm 110:4 says the Messiah is a priest forever after the order of Melchizedek—fulfilled in Jesus (Hebrews 5–7).
These appearances weave through the OT, showing that the one who would become the suffering Servant of Isaiah 53 was already present with Israel.