John Calvin Commentary 1 Corinthians 12:6

"And there are diversities of workings, but the same God, who worketh all things in all." — 1 Corinthians 12:6 (ASV)

One God that works. Where we use the word powers, the Greek term is ἐνεργήματα, a term which contains an allusion to the verb works, just as in Latin, effectus (an effect) corresponds with the verb efficere (to effect). Paul’s meaning is that although believers may be endowed with different powers, they all originate from one and the same power on the part of God. Hence the expression employed here — works all things in all — does not refer to the general providence of God, but to the liberality that he exercises towards us, in bestowing upon every one some gift. The sum is this — that there is nothing in mankind that is good or praiseworthy but what comes from God alone. Hence, it is out of place here to debate the question — in what manner God acts in Satan and in reprobates.