if something changes when something else changes, then that something depends on that something else
sometimes_change is not good_thing. change is not thing. sometimes_change is good_thing. change is when_one_thing_becomes_another_thing. everything is not one_thing_constantly_changes. difference is change. change is thing. change is happening. change is not when_one_thing_becomes_another_thing. everything is one_thing_constantly_changes.