D&C 21:4, 6; “Wherefore, meaning the church, thou shalt give heed unto all his words and commandments which he shall give unto you as he receiveth them, walking in all holiness before me; For by doing these things the gates of hell shall not prevail against you; yea, and the Lord God will disperse the powers of darkness from before you, and cause the heavens to shake for your good, and his name’s glory.”

Matthew 16:18; “And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.”

How can the gates of hell not prevail against you when you obey a manmade rule?  Didn’t Jesus say that it was by His power the gates of hell wouldn’t prevail against His church?