War with the devil: or, The young man's conflict with the powers of darkness [electronic resource] : in a dialogue discovering the corruption and vanity of youth, the horrible nature of sin, and deplorable condition of fallen man. Also a definition, power, and rule of conscience, and the nature of true conversion. To which is added, An appendix, containing a dialogue between an old apostate, and a young professor. Worthy the perusal of all, but chiefly intended for the instruction of the younger sort. By B. Keach, author of Sion in distress, or, the Groans of the Protestant Church.