"When you're preaching in the energy of the flesh, you are going to feel exalted, you're going to feel lifted up.  And when you're preaching in the power of the Holy Spirit, you're going to feel humbled, you're going to feel very low.  ...
When you preach in the power of the Spirit, your heart is going to be filled with awe at what it is that the Spirit of God does."

(Martyn Lloyd-Jones)