Jesus set the standard extremely high in verses 1-4 and the disciples respond: “Increase our faith.” Wow! The disciples are listening to Jesus describe what will happen to those who cause people to stumble and they get it–they will be held accountable. There will be a time when leaders will have to answer for their decisions. “So watch yourselves,” Jesus said.
If you have even a small amount of faith, you can do amazing things. But we are called to be humble and to do all things giving God the glory:
So you also, when you have done everything you were told to do, should say, “We are unworthy servants; we have only done our duty.”
God will do amazing things through our hands, our voices, our lives. Be truly humble when He does!