Nature as a machine, governed by changeless causal law, is necessary to thought.
The substantial good of the universe, in Aristotle's view, is the pure activity of universal abstract thought, at once subject and object, which, itself changeless and eternal, is the final cause and first source of the whole process of change in the concrete world.
Changeless background is needed for the manifestation of the changing universe upon it.
Changeless cause that requires no further triggering events.
Changeless love of the heart of Christ.
How would you define changeless? Add your definition here.