Be a terror to all the adversaries of God, and a dread, answering that of God in them all, spreading the truth abroad, awakening the witness, confounding the deceit, gathering up out of transgression into the life, the covenant of light and peace with God. Let all nations hear the sound by word or writing. Spare no place, spare no tongue, nor pen, but be obedient to the Lord God: go through the work, be valiant for the truth upon earth.
Source: “An Exhortation to Friends in the Ministry,” in Works, Vol. 1