You cannot preach conviction of sin unless you have suffered it. You cannot preach repentance unless you have practiced it. You cannot preach faith unless you have exercised it. True preaching is artesian; it wells up from the great depths of the soul. If Christ has not made a well within us, there will be no outflow from us.
Charles SpurgeonMind how you pray. Make real business of it. Let it never be a dead formality...plead the promise in a truthful, business-like way...Ask for what you want, because the Lord has promised it. Believe that you have the blessing, and go forth to your work in full assurance of it. Go from your knees singing, because the promise is fulfilled: thus will your prayer be answered...the strength [not length] of your prayer...wins...God; and the strength of prayer lies in your faith in the promise which you pleaded before the Lord.
Charles SpurgeonNot that our salvation should be the effect of our work, but our work should be the evidence of our salvation.
Charles Spurgeon