O ever watchful Shepherd, lead, guide, and tend me this day; without Your restraining rod I err and stray. Hedge up my path lest I wander into unwholesome pleasure, and drink its poisonous streams; direct my feet that I be not entangled in Satan's secret snares, nor fall into his hidden traps. Defend me from assailing foes, from evil circumstances, from myself.
My adversaries are part and parcel of my own nature; they cling to me as my very skin; I cannot escape their contact. In my rising up and sitting down they cause me pain; they entice with constant baits; my enemy is within the citadel. Come with almighty power and cast him out, pierce him to death, and abolish in me every particle of carnal life this day. Amen
~ a Puritan prayer, from Valley of Vision