Ecclesiastes: Trusting God when Life is a Vapor

Fog is something you can't see through, you can't grasp with your hands, and it can disappear or appear without warning. According to the Preacher in Ecclesiastes, life is a fog. It's frustrating and confusing; it's beyond our ability to fully comprehend; we're here one moment and gone the next. What is the meaning of life? Why did God make the world the way it is, and where do these truths lead us?