Observe, Paul says he preached faith, not in God the Father, but faith in the Lord Jesus Christ. It is in Jesus that God reconciles the world unto Himself, And if you do not accept Jesus and trust in God's mercy, as shown in Jesus, you will get no relief and no peace. God has promised nothing outside of Jesus. But He has promised everything to him who accepts Jesus Christ's suffering and sacrifice as the sufficient and satisfactory penalty due to his own sins, and believes that Jesus bore his sins in His body on the cross. If Jesus satisfied Paul, He ought to satisfy you, and be worthy of your confidence and trust and worship. Turn from sin, then, with humility and shame that you have so long grieved God, and trust in Jesus, and Jesus alone, and keep doing so for days if necessary, and you can not, and shall not, fail to obtain salvation.
"And He said unto them all, if any man will come after Me, let him deny himself and take up his cross daily and follow Me."
Religion depends on this more than on any other one thing. If we are willing to give up all our own preferences and to deny all our desires and inclinations, we shall not have much trouble at any other point. The greatest hindrance to getting religion or _keeping_ religion is our own desire for ease, comfort and self-gratification, and our aversion to enduring any hardship or privation or suffering. The reason why self-denial is necessary is that our very nature is corrupted and diseased and we are blinded by sin. Once the will of man was the same as the will of God; but, since the fall, the will of man and that of God are directly opposed; and if we live according to God's will, we must go directly against our own.
Self-denial is necessary in avoiding sin to which we are inclined and which we find give us pleasure.
But it is necessary also, when no sin or temptation is present, to preserve that frame of mind which keeps us in readiness for temptation and enables us to resist it when it does come.
A constant habit of self-denial is necessary to make us proof against the gradual and unperceived approach of sin either in the form of coldness and distaste for religion, or sloth, or a desire to gratify the flesh. So Paul (I. Cor. ix., 27) said he kept his body under and brought it into subjection, lest _even he_, through the deceitfulness of sin, should become a castaway.