The concept that Jesus Christ is concealed in the Old Testament but revealed in the New Testament is a profound theological truth. While the Old Testament does not mention Jesus explicitly by name, it is rich with typology, prophecies, and Christophanies (pre-incarnate appearances of Christ) that foreshadow and anticipate His coming.
The Lord bless you and keep you; the Lord make his face shine on you and be gracious to you.
Numbers 6:24-25 (NIV)