Jamieson, Fausset and Brown on 1 Corinthians 1:24

24. called--(compare 1Co 1:26). The same class as the "us which are (being) saved" (1Co 1:18); the elect, who have obeyed the call; called effectually (Ro 8:28, 30).

Christ--"Crucified" is not here added, because when the offense of the cross is overcome, "Christ" is received in all His relations, not only in His cross, but in His life and His future kingdom.

power--so meeting all the reasonable requirements of the Jews who sought "a sign." The cross (the death of a slave), which to the Jews (looking for a temporal Messiah) was a "stumbling-block," is really "the power of God" to the salvation of all who believe.

wisdom of God--so really exhibiting, and in the highest degree (if they would but see it), that which the Greeks sought after--wisdom (Col 2:3).