On that subject, there is an interesting statement mad by Fred Craddock in his Commentary on Luke regarding verse 54 of this Sunday's Gospel reading, Luke 9:51-62.
Jesus' disciples remember quite well scriptural precedent for calling down heaven's fire (II Kings 1:9-10), but they have forgotten the recent words of Jesus: when on a mission, acccept the hospitality offered you. If none is extended, shake the dust off your feet and move on (9:1-6). Is it not interesting how the mind can grasp and hold those Scriptures which seem to bless our worst behavior and yet cannot retain past the sanctuary door those texts which summon to love, forgiveness, and mercy? Jesus rebukes James and John for an attitude of revenge and retribution, an attitude totally foreign to his ministry and theirs.If the apostles were called to leave judgement to the Lord, then I believe we are too.