WC, they tell you you have to go out in Service and this is based on a couple of scriptures that they like to blow out of proportion. First is that one they use in the OT where it says "If I say to someone wicked "you will positively die" and you do not warn him of his wickedness, then he in his own error will die, but his blood I shall ask back from your own hand." I can't remember if God was saying this to Jonah or who he said it to. Fast forward 2500 years into the future and they tell you that this is applying to us today and that unless you go out and knock on the same doors for 130 years getting 10 hours a month in service, talking to good decent people about how they're gonna die if they don't become a JW, then YOU'RE gonna die!
They also use a scripture in Acts where Paul says: "While I did not hold back from teaching you publically, and from house to house." This is the scripture they use to justify their annoying ritual every week of knock, knock, knock and on the surface, it seems to have merit. However, a closer study of the original meaning of "house to house" puts it in a different light. This was more than likely talking about going to the homes of people that had already converted to Christianity, not knocking on the doors of unbelievers.
There is absolutely no evidence in the bible that Jesus went from house to house trying to convince people that he was the Messiah. He taught either in the Synagogues, in public squares or anywhere out in the open where anyone who wanted to hear him could listen, and those that didn't want to listen, didn't have to.
They also use the scripture that says "faith without works is dead." They interpret these "works" to be Field Service. The Society's veiled threat that you will die at Armagedon if you don't go out in Service at every opportunity, works well. No loyal Witness wants to risk Jehovah's wrath at the Big A and miss out on living in a Paradise which is "right around the corner". They therefore teach that you have to EARN everlasting life (even though they do say it's a gift), you can't just waltz through there. This is simply a tactical cult technique to keep everyone in line..........