Despite the fact that God’s unmerited favor is extended to all mankind, this common grace must not be confused with special grace (that is, saving grace). God’s common grace leaves man with no excuse (Rom. 1:20), but common grace alone is not salvific. It does not and cannot save. Salvation is found exclusively in Jesus Christ (Ac. 4:12)… In order for man to be saved, the special of grace is required.
Keith Mathison