he has a bit of a temper on him. he'll say things which he then regrets and changes his mind about things. he's the most three-dimensional of the disciples. >> significantly, according to john's gospel, early on in his ministry, jesus renames peter. >> peter's actual name is simon or siemian and he appears to have been renamed by jesus, peter or kifas and this is the word for rock and it seems to be that he's nicknamed rock because in spite of all peter's failings, he's the one jesus trusts to be the rock at the heart of the movement. >> jerusalem, after spending many months preaching around galilee, jesus, peter and the disciples bring their message here to the holy city itself.