Isaiah 7:14

Therefore the Lord Himself, in a significant revelation of His almighty power, shall give you a sign, cause a miracle to happen which would have abiding significance. Behold, an exclamation calling attention to the extraordinary prophecy now following, a virgin, literally, "the virgin," that certain virgin whom the Lord had even now selected for this purpose, not merely an unwed woman of marriageable age, but an undefiled maiden, Psalms 68:25; Matthew 1:25, shall conceive, without the carnal knowledge of man, and bear a son, the event being represented as happening now, in the everlasting present of the eternal God, and shall call His name Immanuel, which is correctly interpreted by Matthew as meaning, "God with us. " This name characterizes the person, the essence, and the work of the Messiah. The son of the virgin, conceived and born a true human being, yet without sin, is at the same time true, almighty, eternal God. It is the great mystery of godliness: God manifest in the flesh, the true Savior, Protector, and Helper of all men.