[af_vet_1981]

Peter was not saved, not even converted (Luke 22:31-32) at that evening; and, similar to his ability to be prompted by Satan as in Matthew 16:22-23, Satan had Peter, was sifting him, and used Peter’s inability to master his stupid lashing out at Malchus in order that Satan might work through him to create a situation which would cause Jesus to be killed through rebellion, thus preventing Jesus from being sacrificed on the cross.

He saith unto them, But whom say ye that I am? And Simon Peter answered and said, Thou art the Christ, the Son of the living God. And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
-- Matthew, catholic chapter sixteen, protestant verses fifteen through seventeen, as authorized by King James

I have manifested thy name unto the men which thou gavest me out of the world: thine they were, and thou gavest them me; and they have kept thy word. Now they have known that all things whatsoever thou hast given me are of thee. For I have given unto them the words which thou gavest me; and they have received them, and have known surely that I came out from thee, and they have believed that thou didst send me. I pray for them: I pray not for the world, but for them which thou hast given me; for they are thine. And all mine are thine, and thine are mine; and I am glorified in them.
-- John, catholic chapter seventeen, protestant verses six through ten, as authorized by King James

[imardmd1]

You are looking into the future, not at the moment for which the questions were asked. Satan was influencing Peter when he thought he was smarter than Jehovah Jesus Christ.