I love these two quotes found at, ‘Of First Importance‘:
“The acid test of biblical God-centeredness — and faithfulness to the gospel — is this: Do you feel more loved because God makes much of you, or because, at the cost of His Son, He enables you to enjoy making much of Him forever? Does your happiness hang on seeing the cross of Christ as a witness to your worth, or as a way to enjoy God’s worth forever? Is God’s glory in Christ the foundation of your gladness?” – John Piper, God is the Gospel (Wheaton, Ill.: Crossway Books, 2005), 11-12.
“I am well satisfied it will not be a burden to me at the hour of death, nor be laid to my charge at the day of judgment, that I have thought too highly of the Lord Jesus Christ or labored too much in commending and setting Him forth to others, as the Alpha and Omega, the Lord our righteousness, the sufficient atonement for sin, the only Mediator between God and men, the true God and eternal life.”- John Newton, Letters of John Newton