Jeremiah 10 is satirical. God mocks the idols of the people in plain and vivid language.
IDOLS:
10:3 - they are nothing but wood cut from the forest
10:4 - people fasten them with nails so they won't fall over
10:5 - an idol is like a scarecrow in a cucumber field: it just sits there where you put it; cannot speak; must be carried because it can't walk; it can't do any harm or any good - good for absolutely NOTHING!
10:14 - no breath in them
10:15 - they will perish
GOD:
10:6 - "None like You"
10:7 - King of the nations
10:10 - the true God, the living God, the everlasting King; at His wrath the earth quakes
10:12 - He made the earth by His power
10:16 - the Maker of all, the LORD of hosts
It is in this context we have Jeremiah 10:23, "I know, O LORD, that a man's way is not in himself, Nor is it in a man who walks to direct his steps." An idol is, at the heart of the matter, man directing his own steps. Man makes his own god, comes up with his own methods of worship, and lives life however he decides is right. How much better to understand the truth: there is a great Creator who made MAN, who tells man how He wants to be worshipped, and how we are to live righteously on this earth.
Who directs my steps?
Nathan