1. This speaks to the reciprocal relationship between G-d and humankind: one
acts and the other reacts in kind; without the actions of the first, the
actions of the second are somehow less than ideal.
It also speaks to the idea of our being G-d’s “partners” in this world (see
Shabbos 11a, 119b).
2. See Da’at Tevunot 126.
3. That’s to say that even loving reciprocal relationships follow rules
which both participants must submit to. Given that G-d is one of the
participants in the give-and-take discussed here, it follows that it’s His
rules that are the ones needed to be taken into account, and that while G-d
Himself so to speak “follows” (and initiates) the rules, man cannot help but
follow them, too, despite his free will.
4. This addresses a major theme in Ramchal’s kabbalistic works that’s beyond
our scope. Refer to Klach Pitchei Chochma 80 for a discussion of “Radlah”
Rabbi Yaakov Feldman has translated and commented upon "The Gates of Repentance", "The Path of the Just", and "The Duties of the Heart" (Jason
Aronson Publishers). His works are available in bookstores and in various
locations on the Web.