Peter evidently did not view himself as the rock on which Jesus would build his congregation, since he wrote at 1Pe 2:4-8 that Jesus was the long-foretold “foundation cornerstone,” chosen by God himself. Similarly, the apostle Paul referred to Jesus as the “foundation” and “the spiritual rock.” (1Co 3:11; 10:4). For every Christian or follower of Christ their church or community should have Jesus as their cornerstone and not as such one or another hierarchical religious organisation.
Not many believers may considered wise or powerful according to human standards, or may not being 'well born' or from "blue blood". In the Scriptures may be found many words also from foolish men. Many wrong actions of men are notated in the bible so that people can learn from them. Those foolish things of the world God chose in order that He might put to shame the wise, and the weak things of the world God chose in order that He might put to shame the strong, and the insignificant of the world.