The Weapon (Part II of Fear) Lyrics

Lyric discussion by TheEndIsNear 

Cover art for The Weapon (Part II of Fear) lyrics by Rush

I was listening to it one day, and I think I figured out what it means. The song is actually quite literal for Peart. It's basically saying that something a person fears, whether it be knowledge, weaponry, or something else, is a "Weapon to be held/used against them/him". (Which does include, but not limited to, nuclear weaponry.)