>> reporter: every saturday morning, clive doyle and sheila martin study the bible. >> behold god wille with strong hand -- >> reporter: they are about all that's left in waco of the branch davidians, an offshoot of the seventh day adventist church. their religious community went back generation. it even issued its own currency during the great depression. david koresh came to the faith and its texas commune in 1981. who was he back then, to you? >> just a bum. >> reporter: former branch davidian, kathy jones, and her husband, david, had seen religious visionaries come and go. >> god speaks to me. >> reporter: this time was different. koresh would preach his way to power. >> i remember in the beginning, everybody was like, oh, he's crazy, you know. he's this and that. i mean, that's all i heard. all of a sudden, people were like, well, we're listening to him. he has a message. >> one, two, three, four. ♪ >> reporter: the message was a spellbinding account of revelation, the new testament's final book. ♪ revelation 14 his message >> reporter: koresh claimed that he alone could explain t