Mark 14:29

But Peter said unto him, Although all shall be offended, yet will not I.

Peter was not alone in rejecting the idea of their failure, for both Mark and Matthew relate how "all the disciples" made the same affirmation of loyalty. What none of them realized was that the source of true spiritual strength had not yet been provided through the death of the Christ, and that it was therefore impossible for them to have stood without that strength. Peter, more vehement than the rest, and, as always, the spokesman, was in the forefront here.