Tape recordings of Sydlik's talks were re-copied and spread throughout the world.
I can remember in the late 80's / early 90's a recording where he talked excitedly about the 'bible code' found in the Torah. This was a method by which specific letters from the text can be selected to reveal an otherwise obscured message. He gave as an example a code for the names of trees found in Eden.
He then speculated that as the code was further deciphered, it could reveal a message that JW's are the true religion. Of course when a GB member - particularly one with the delivery of Sydlik - speculates, the sheep get carried along.
Can also remember him talking about rap music in relation to young people being reluctant to engage in preaching. Used an example of 5 year-olds being able to rap out songs. So ... if a 5 year-old can rap out songs, they should be able to rap-out a magazine presentation.