God chose Moses to lead Israel’s descendants out of slavery in Egypt. Moses resisted at first, making excuses about his speaking abilities.
Then the LORD said to him, “Who has made man’s mouth? Who makes him mute, or deaf, or seeing, or blind? Is it not I, the LORD? Now therefore go, and I will be with your mouth and teach you what you shall speak.” (Exodus 4:11-12)
God spoke with Moses directly. “The LORD used to speak to Moses face to face, as a man speaks to his friend” (Exodus 33:11). “With [Moses] I speak mouth to mouth, clearly, and not in riddles” (Numbers 12:8). In time, God commanded Moses to write His words in a book, a record to be preserved for future generations (Exodus 17:14; 24:4; 34:27; Deuteronomy 31:9). The chosen human did the writing, but the words came from God—another way of saying, God inspired the Scriptures. Whether in verbal or written form, was God’s message clear to the Israelites? Again, their very lives depended on the clarity with which God revealed His will.
[Moses said,] “This commandment that I command you today is not too hard for you, neither is it far off…. The word is very near you. It is in your mouth and in your heart, so that you can do it…. If you obey the commandments of the LORD your God that I command you today, by loving the LORD your God, by walking in His ways, and by keeping His commandments and His statutes and His rules, then you shall live and multiply.” (Deuteronomy 30:11, 14, 16)
Take to heart all the words by which I am warning you today, that you may command them to your children, that they may be careful to do all the words of this law. For it is no empty word for you, but your very life.(Deuteronomy 32:46-47)