For me, it wasn't the Watchtower's biggest lie; it was the bible's lies. To realize (at the age of 8) that the Israelites were too stupid, ignorant, or uneducated to realize that the mountain 'Moses' was receiving the 'Ten Commandments' upon was a VOLCANO... An actively erupting one, at that....
Exodus 19: 16-19, Christian Standard Bible... "On the third day, when morning came, there was thunder and lightning, a thick cloud on the mountain, and a loud trumpet sound, so that all the people in the camp shuddered. Then Moses brought the people out of the camp to meet god [they almost ended up meeting their maker, all right... Where's a pyroclastic flow when you need one??] and they stood at the foot of the mountain. Mount Sinai was completely enveloped in smoke because the lord came down on it in fire. Its smoke went up like the smoke of a furnace, and the whole mountain shook violently. As the sound of the trumpet grew louder and louder, Moses spoke and god answered him in the thunder...."
Yeah... Clearly a primitive, ignorant tribe's - group of tribes' - attempt to explain a volcanic eruption. The descriptions of volcanic eruptions in the mythology of the Native Americans living near Mt. Saint Helens are much more picturesque and delightful, by the way...
I was speechless. If this book [collection of books; biblyos] was supposed to be 'divinely inspired', then either the Israelites were idiots who didn't have a clue as to how the earth really worked, or their god didn't have a frikkin' clue - or wanted them in danger of being destroyed while 'he' was handing out orders, or... Their god didn't really exist.
And that was it. I saw behind the mask, and was changed forever.
Zid