Moses refers to the consternation caused by the terror with which the law was given. God's appearances have always been terrible to man, ever since the fall; but Christ, having taken away sin, invites us to come boldly to the throne of grace.
They were in a good mind, under the strong convictions of the word they heard. Many have their consciences startled by the law who have them not purified; fair promises are extorted from them, but no good principles are fixed and rooted in them.
God commended what they said. He desires the welfare and salvation of poor sinners. He has given abundant proof that he does so; he gives us time and space to repent. He has sent his Son to redeem us, promised his Spirit to those who pray for him, and has declared that he has no pleasure in the ruin of sinners.
It would be well with many, if there were always such a heart in them, as there seems to be sometimes; when they are under conviction of sin, or the rebukes of providence, or when they come to look death in the face.
The only way to be happy, is to be holy. Say to the righteous, It shall be well with them. Let believers make it more and more their study and delight, to do as the Lord God hath commanded.