"You are preparing yourselves in pursuance of a divine call for the ministry of the Word without which the whole world perishes in sin, in misery and death. You are training for the most militant service in that kingdom that is an everlasting kingdom and in that dominion which shall not be destroyed. Militant service, indeed, for we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of this darkness, against the spiritual hosts of wickedness in high places. All of this lays upon you an exacting obligation."
–John Murray, Collected Writings, vol. 1, (Edinburgh: Banner of Truth, 1989 rep.), pp. 105-106.