10 But by the grace (the unmerited favor and blessing) of God I am what I am, and His grace toward me was not [found to be] for nothing (fruitless and without effect). In fact, I worked harder than all of them [the apostles], though it was not really I, but the grace (the unmerited favor and blessing) of God which was with me.

11 So, whether then it was I or they, this is what we preach and this is what you believed [what you adhered to, trusted in, and relied on].

12 But now if Christ (the Messiah) is preached as raised from the dead, how is it that some of you say that there is no resurrection of the dead?