There is sufficient power in the blood of the cross to wash away the greatest sins. Before the efficacy of this blood, guilt vanishes and shrinks away as the shadow before the glorious sun. Every drop of it has a voice, and speaks to the soul that sits trembling under its guilt better things than the blood of Abel (Heb. 10:24). For having enough in it to satisfy God, it must needs have enough in it to satisfy conscience.
Can God exact satisfaction from the blood and death of his own Son, the surety of believers, and yet still demand it from believers? It cannot be.”
— John Flavel, The Fountain of Life
HT: Of First Importance