The true secret of ministry is spiritual power. It is not man’s genius or man’s intellect or man’s energy. A ministry which flows from abiding dependence upon the Holy Spirit can never become barren.
If a man is drawing upon his own resources, he will soon run dry. It matters not what his powers may be or how extensive his reading or how vast his stores of information; if the Holy Spirit be not the spring and power of his ministry, it must, sooner or later, lose its freshness and its effectiveness.
From Gems From My Reading