In St. John 12:49 the word says "For I have not spoken on my own authority, but the Father who sent me has.... this is Jesus talking He would not speak but what His Father would tell Him to speak. When Jesus the living word spoke He represented the authority of his Father's words. Hanging on the cross Jesus said it is finished, it was then He transferred His authority over to His image and that's us. So I can only speak what Jesus says I can speak. If He says whatever you bind on Earth is bound in Heaven and whatever you loose on Earth is loosed in Heaven. Then my words carry the authority of the one that said it is finished that's who I represent.