You accepted the real Saviour for your real sin, and you believed in the real death of Christ for you: are you going to run back? Will you doubt your Lord after this? God grant you may not; but, on the contrary, may you go on confirming the testimony of Jesus, and setting it to your seal again and again that God is true! Give glory to God by believing that what he has promised he is able also to perform. Never stagger at the promise through unbelief. All the promises of God are yea and amen in Christ Jesus, to the glory of God by us; wherefore, we set to our seal that God is true. I have done, when I have said just this. Avoid, dear hearers, anxiously, the double sin of unbelief. If you do not believe Jesus, you do not believe God. If you reject his Son, you reject himself. If you give the lie to the teaching of Christ, you give the lie to God. Flee from this deadly sin.
–Charles Spurgeon, “Christ’s Testimony Received”–