War with the devil, or, The young mans conflict with the powers of darkness : 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 /