This promise is a declaration, from the very mouth of God about who He is. He never changes.

The world you live in is continually changing. New technology and information show up daily. Sometimes you wake up in the morning to find your phone was updated during the night and new features have been added and changes have been made. In general, change is good; it's part of life. Change means progress and improvement. Typically, things get better as they change. 

Change can also be a source of stress and confusion. Because your world is constantly changing, you seem to live on a learning curve. What you counted on yesterday just isn't available today; things have changed.