Man's wisdom vs. God's Wisdom

Is a good idea always a Good idea? Reading C.S. Lewis' The Problem of Pain this afternoon, something struck me. He says something along the lines of:

If God's wisdom is greater than Man's, not everything God does is going to make sense

So, when I see really good ideas, but have a feeling that I shouldn't partake, could it be that this really good idea isn't a real Good idea?