These passages are some of the most familiar in the Old Testament. Through the preaching of the Word of God and the powerful movement of His Spirit (The Wind) life can return in the mist of the most dire circumstances.
The dry bones represent the whole house of Israel. They believed that all hope was lost because of their captivity in Babylon. However, God wanted the Prophet Ezekiel to inform them that they will live.
That's the word for us - We Shall Live in spite of the difficulties and set backs that life will bring. We Shall Live. God said it and we can count on it.