Who is this Jesus and who did people want Him to be?

Being great isn't about expecting to be served; it is about serving to expectation: each of us is created to do good things, serving is discovering and Jesus-like or not so Jesus-like. 

What is our conscience, how does Satan attack it and how do we get and keep a good conscience?

Satan attacks our will with pride, with pride so that we ignore the best path for life, we fight back with the humility of Jesus and we can choose humility with Jesus' help.