Therefore whether it were I or they, so we preach, and so ye believed.

People's New Testament

15:11 Whether it were I, or they, so we preach. I and all the apostles preach the same gospel of a risen Lord and this you accepted when you believed. Their faith was built on the resurrection.

Wesley's Notes

15:11 Whether I or they, so we preach - All of us speak the same thing.

Jamieson-Fausset-Brown Bible Commentary

11. whether it were I or they-(the apostles) who "labored more abundantly" (1Co 15:10) in preaching, such was the substance of our preaching, namely, the truths stated in 1Co 15:3, 4.

Matthew Henry's Concise Commentary

15:1-11 The word resurrection, usually points out our existence beyond the grave. Of the apostle's doctrine not a trace can be found in all the teaching of philosophers. The doctrine of Christ's death and resurrection, is the foundation of Christianity. Remove this, and all our hopes for eternity sink at once. And it is by holding this truth firm, that Christians stand in the day of trial, and are kept faithful to God. We believe in vain, unless we keep in the faith of the gospel. This truth is confirmed by Old Testament prophecies; and many saw Christ after he was risen. This apostle was highly favoured, but he always had a low opinion of himself, and expressed it. When sinners are, by Divine grace, turned into saints, God causes the remembrance of former sins to make them humble, diligent, and faithful. He ascribes to Divine grace all that was valuable in him. True believers, though not ignorant of what the Lord has done for, in, and by them, yet when they look at their whole conduct and their obligations, they are led to feel that none are so worthless as they are. All true Christians believe that Jesus Christ, and him crucified, and then risen from the dead, is the sun and substance of Christianity. All the apostles agreed in this testimony; by this faith they lived, and in this faith they died.