I challenge those that claim to have the power or means to cause the new birth to raise themselves from the dead three days later! Oh wait, they can't hear me!
We cannot bring ourselves to Christ, nor would we have the desire to come to Him. And, even if our loved ones desired that we be raised to spiritual life, they do not have the power to bring us to Christ.
The church is not built upon Peter with him as the first pope. The church is built upon Jesus Christ, the true Rock of ages!
If Jesus came and died on the cross only to make salvation a possibility, then He does not seem very powerful does He?