" upon the condition of outward national obedience; and the covenant of Grace was ratified personally with true believers, and sealed and secured spiritual blessings to them, by producing a holy disposition of heart, and spiritual obedience to the Divine law. In case Israel kept the covenant, the Lord promised that they should be to Him ‘a peculiar treasure.’ ‘All the earth’ (Ex. 19:5) being the Lord’s, He might have chosen any other people instead of Israel: and this implied that, as His choice of them was gratuitous, so if they rejected His covenant, He would reject them, and communicate their privileges to others; as indeed He hath done, since the introduction of the Christian dispensation" (Thomas Scott). "

― Arthur W. Pink ,