Does God change or does He always remain the same? I think the answer is both. The qualities of God do not change. God always loves us, always longs for a relationship with us, and always works to bring us into or back to that relationship with Him through Jesus Christ, His Son. God loves good, wants justice for all, and seeks for His people to love Him and to love neighbor.
The city of Nineveh was full of vice, sin, evil. God wanted to restore them, to see them repent. So He sent Jonah and he proclaimed God’s message to the people. The people repented and God had compassion on them. Their actions changed their outcome. Some would say it all went according to God’s plan. But if the Ninevites would’ve kept to their evil ways…
God acts much the same way in our lives. In His many attempts to love on us and be in relationship with us, He sends us Jonahs to help us make good choices, to help us walk in His ways. We hear this voice in the Bible, in sermons, in conversations with Christian friends. God also speaks to us through the Holy Spirit. When we fail to heed to these voices, God just finds another voice or another way to get our attention. Some people spend a long time trying to ignore God and His messages.
In this we find another way that God never changes: He so wants all of us to enter into His eternal kingdom. He spends our whole lifetime if necessary working towards that end. Again, I say thank you God!
Scripture reference: Jonah 3: 1-5 and 10