Hebrews 13

Jesus Christ is the same yesterday, today, and forever.  v.8

Read chapter 13
The unchangeable God changes.  What?  If Jesus Christ is the same yesterday, today and forever then why does He seem different from the Old Testament to the New?  Why do we read of times He seems to change His mind like in the example of Jonah and the Ninevties?  Well I think it has to do with the matter that God's character never changes, but His dealings with man does.  Just like our relationships change with people as we respond to them in different temperaments for example when someone is sad we approach them differently.  Bible teacher Nathan Johnson explains it,  "God is unchanging in His essential nature and character. This is not true of us. Being finite beings, we can and should grow and mature as time goes on. Hopefully over time we improve in character, although some do the opposite and their character corrupts as time goes on. Yet for God this is not so. His nature, His character, is perfect from the beginning, and so no growth or change is necessary or even possible. God is already perfect. He does not need to grow and change in character. The only growth that occurs with Him is growth in relationship with His people, which growth is on our part, and only receives a response from Him." (www.precepts.wordpress.com)
Jesus is Jehovah of the Old Testament.  Jehovah and Jesus are the names for God of relationship.  God has always been the God of relationship both then and now.  God's dealing with man today is not the same as God dealt with men in the Old Testament nor will it be in the Kingdom the same as today.  He is always the God of grace, the God of justice, the God of mercy, but it's who He choses to act or not in relation to His people through these characteristics.  How have you seen the unchangeable characteristics of God as well as how He changes in relationship with His created people?