God is the same at all times and never changes. When Jesus came on the ministry scene, he also had the same nature as God... Hebrews 13:8 Jesus Christ the same yesterday, and to day, and for ever. As time passed, God has been able to bring in better covenants that are more effective than others. This is due to the gains and opportunities made by faithful men and women. After the death and resurrection of Christ, God had a mechanism for continually providing the bulk of his desired blessings for all humanity... the anointing of the Holy Spirit. Interestingly, God has always offered mankind the same types of blessings, but he never had a consistent and effective way of doing so. God's nature has never changed... as the following verses indicate.