"And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it."
or
“Everyone then who hears these words of mine and does them will be like a wise man who built his house on the rock."

Yes the Faith is set in stone sorta like the Ten Commandments.

Rules do not inevitably fail, people fail inevitably who do not obey them. Besides the rules of God are more accurately portrayed as LAWS.
Jesus also said to the woman who was about to be stoned for adultery, I do not condemn you but go and sin no more. He also said; "Be perfect, therefore, as your heavenly Father is perfect." That can not be done by one's own self sufficiency but through the grace of God and a close proximity to Him.

When a leader of any organization tells people we have many difficult things we need you to do, people respond to a higher level of competence. When you have a leader who lowers the bar people will do less, and so it is with this pope.