Baal HaSulam gives a fine example of that in the article Thou Hast Hemmed me from Behind and Before, where if a force, an angel, comes from Above to lead a person, and the person can't work with this force, this force is cancelled and in its place comes something else through the providence. It means that by cause and consequence, all kinds of forces come to a person, and according to a person's willingness to absorb and work with it, it is registered and is absorbed in himand changes him...