The way in which the effect is produced is not through flashing excitement alone, but rather through the functioning of the different individual aspects of the Partzufim involved – by means of actual coupling. The roots begin in the mind and brain of each of the powers involved and continue down by way of their organs of procreation – the Yesod in each case. Two causal factors underlie every level in the developmental sequence. One provides the overall root, and one provides the specific preparations and repairs for that entire generality.