Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear: We receiving a kingdom - The Gospel dispensation, frequently termed the kingdom of God and the kingdom of heaven, because in it God reigns among men, and he reigns in the hearts of them that believe, and his kingdom is righteousness, peace, and joy in the Holy Ghost.
Which cannot be moved - Which never can fail, because it is the last dispensation.
Let us have grace - Εχωμεν χαριν· Let us have, keep, or hold fast, the benefit or gift, that is, the heavenly kingdom which God has given us. This is the meaning of the word, 2 Corinthians 8:4, and is so rendered by our translators; and it is only by this heavenly gift of the Gospel that we can serve God acceptably, for he can be pleased with no service that is not performed according to the Gospel of his Son.
If we prefer the common meaning of the word grace it comes to the same thing; without the grace - the especial succor and influence of Christ, we cannot serve, λατρευωμεν, pay religious worship to God; for he receives no burnt-offering that is not kindled by fire from his own altar.
Acceptably - Ευαρεστως· In such a way as to please him well. And the offering, with which he is well pleased, he will graciously accept; and if he accept our service, his Spirit will testify in our conscience that our ways please him. When Abel sacrifices, God is well pleased; where Cain offers, there is no approbation.
Reverence - Αιδους· With shamefacedness or modesty.
Godly fear - Ευλαβειας· Religious fear. We have boldness to enter into the holiest by the blood of Jesus, but let that boldness be ever tempered with modesty and religious fear; for we should never forget that we have sinned, and that God is a consuming fire. Instead of αιδους και ευλαβειας, modesty and religious fear, ACD*, several others, with the Slavonic and Chrysostom, have ευλαβειας και δεους, and others have φοβου και τρομου, fear and trembling; but the sense is nearly the same.