Preaching on Mark 9:17-18 Dr Martyn Lloyd-Jones said: “You must become aware of your need, of your impotence, of your helplessness. You must realise that you are confronted by something that is too deep for your methods to get rid of, or to deal with, and you need something that can go down beneath that evil power, and shatter it ... and there is only one thing that can do that, and that is the power of God. And we too, must become aware of that, we have got to feel it until we become desperate. We must ask ourselves how we can succeed if we do not have this authority, this commission, this might and strength and power. We must become utterly and absolutely convinced of our need. We must cease to have so much confidence in ourselves, and in all our methods and organisations, and in all our slickness. We have got to realise that we must be filled with God’s Spirit. And we must be equally certain that God can fill us with his Spirit. We have got to realise that however great ...