War with the devil, or, The young mans 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.K.