If we get away from brooding on the tragedy of God upon he Cross in our preaching, it produces nothing. It does not convey the energy of God to man; it may be interesting but it has no power. But preach the Cross-, and the energy of God is let loose. It pleased God to by the foolishness of preaching to save them that believe. “We preach Christ crucified.”
You see, we lose power if we can’t concentrate on the right thing. The effect of the Cross is salvation, sanctification, healing, etc., but we are not to preach any of these, we are to preach Jesus Christ and Him crucified. We have to concentrate on the great point of spiritual energy—the Cross, to keep in contact with that center where all power lies, and the energy will be let loose.
Oswald Chambers