Venus, ruler of Libra, is posited in the 1st (whole sign) house: though weakened by its Fall in Virgo, this is compensated for by Venus being angular, in the strongest angular house (the 1st) and also being in the angular part of that house (if Venus were in the cadent 12th house and also in its Fall, it could not have any influence as dispositor over the mass of planets in Libra, and Pluto and Mars-in my opinion-would have, and still be, running all over you) But Venus is strengthened by position (it is also above the other planets in Libra vis a vis chart position) So this "strengthened" Venus (cool and moist) as dispositor of Pluto and Mars and Sun, "modifies" their potential intensity, and draws off some of their qualities, filters these and "pours" them in a Venusian-modified "form" into your first house.
Mercury, "on the bottom end" of the 2nd (whole sign) house, is still strong (succedent house, rising up toward the other 2nd house planets) and is the dispositor of your ascendant sign (also of your ascendant Manilius decanate) Mercury is also a "cool" planetary element, again mdoifying the extreme "heat" (fire) represented by Pluto + Mars + the Sun (and the electric fire of Uranus too) So, 2 planets intimately connected with your "essence" (ascendant/1st house), Venus (in 1st house and dispositor of all the planets in the 2nd house) and Mercury (double dispositor of the actual ascendant degree) "contain" the mass of 2nd house planets, and thus bring them-to a significant extent-under control (or at least influence) of your "will" (essence, ascendant, 1st house)
Hope this explains my meaning in the above quotation from my previous post.