“The importance of God’s speech as a fundamental means of his self-disclosure cannot be overestimated. Creation itself is the product of God’s speech: God speaks, and worlds leap into being (Gen. 1). Many of God’s most dramatic deeds of revelation would not have been understandable apart from God’s accompanying speech. Moses views the burning bush as a curiosity until the voice tells him to remove his sandals and assigns him his new responsibilities. Abraham would have had no reason to leave Ur were it not for God’s revelation in words. Again and again the prophets carry the burden of ‘the word of the LORD’ to the people. Verbal revelation is essential even in the case of the Lord Jesus: during the days of his flesh, he was, first of all, the teacher. Moreover, apart from the explanation of the significance of his death and resurrection, preserved both in the gospels and in the letters, even these momentous events would have been unbearably and tragically obscure. So central is God’s speech to his own self-disclosure that when John the evangelist casts around for an encompassing way to refer to God’s ultimate self-disclosure in his Son, he chooses to refer to him as ‘the Word, and the Word was with God, and the Word was God … The Word became flesh’ John 1: 1, 14).”
D. A. Carson in the New Bible Commentary: 21st Century Edition. Edited by D. A. Carson, R. T. France, J. A. Motyer, and G. J. Wenham, IVP (1994).