Here are some great quotes concerning the Gospel from the Together for The Gospel Blog:
“If you believe what you like in the gospel, and reject what you don’t like, it is not the gospel you believe, but yourself.” (Augustine)
“The whole gospel is contained in Christ.” (John Calvin)
“Whenever the gospel is preached it is as if God himself came into the midst of us.” (John Calvin)
“There is nothing attractive about the gospel to the natural man; the only man who finds the gospel attractive is the man who is convicted of sin.” (Oswald Chambers)
“A gospel that elevates man and dethrones God is not the gospel.” (Will Metzger)
“The world has many religions; it has but one gospel.” (George Owen)
“The man who does not glory in the gospel can surely know little of the plague of sin that is within him. (J.C. Ryle)
“The revelation of the gospel is to a world that is already under indictment for its universal rejection of God the Father.” (R.C. Sproul)
“If the Lord’s bearing our sin for us is not the gospel, I have no gospel to preach.” (C.H. Spurgeon)
“The heart of the gospel is redemption, and the essence of redemption is the substitutionary sacrifice of Christ.” (C.H. Spurgeon)
“When we preach Christ crucified, we have no reason to stammer, or stutter, or hesitate, or apologize; there is nothing in the gospel of which we have any cause to be ashamed.” (C.H. Spurgeon)
“The gospel is a glorious declaration of the mighty acts of God when he invaded this earth in the person of his eternal Son, the Lord Jesus Christ.” (John Blanchard)
“The gospel is not ‘God loves us,’ but ‘God loves us at the cost of his Son.’” (Derek Thomas)
“As there is only one God, so there can be only one gospel.” (James Denney)
“The church is the fruit of the gospel.” (Hywel R. Jones)
“We have an unchanging gospel, which is not today green grass and tomorrow dry hay; but always the abiding truth of the immutable Jehovah.” (C.H. Spurgeon)
“The gospel begins and ends with what God is, not what we want or think we need.” (Tom Houston)
And some more quotes from the pen of Charles Spurgeon:
“Never lose heart in the power of the gospel. Do not believe that there exists any man, much less any race of men, for whom the gospel is not fitted.” (CHS)
“Let this be to you the mark of true gospel preaching - where Christ is everything, and the creature is nothing; where it is salvation all of grace, through the work of the Holy Spirit applying to the soul the precious blood of Jesus.” (CHS)
“If God does not save men by truth, he certainly will not save them by lies. And if the old gospel is not competent to work a revival, then we will do without the revival.” (CHS)
“On Christ, and what he has done, my soul hangs for time and eternity. And if your soul also hangs there, it will be saved as surely as mine shall be. And if you are lost trusting in Christ, I will be lost with you and will go to hell with you. I must do so, for I have nothing else to rely upon but the fact that Jesus Christ, the Son of God, lived, died, was buried, rose again, went to heaven, and still lives and pleads for sinners at the right hand of God.” (CHS)
HT: Together for the Gospel