1 Corinthians 1:18 (ESV) 18 For the word of the cross is folly to those who are perishing, but to us who are being saved it is the power of God.

"We preach Christ crucified, a stumbling block to Jews and folly to Gentiles, but to those who are called, both Jews and Greeks, Christ the power of God and the wisdom of God." Therefore, the power of God in 2:5 in which our faith should rest is the divine power unleashed by the death of Christ to save sinners, to justify the ungodly. When Jesus was at his weakest in the agony of the cross, God's power was at its strongest, lifting the infinite weight of sin and condemnation off the backs of all who would believe on him. Because Jesus died and bore the punishment of our sin, all the power of God, who created the universe, was loosed for the benefit of God's elect.