Breadcrumb: God works in mysterious ways?

Deut. 29:29 reads, in the KJV: "The secret things belong unto the LORD our God: but those things which are revealed belong unto us and to our children for ever, that we may do all the words of this law." Could this be justification for the saying, "God works in mysterious ways?" After all, if we knew the secret things that only God knows, we might more fully understand his decisions. With secret knowledge comes power, and God's power can be argued to be absolute. At least he has justification for being mysterious -- we just don't know what it is.