It is important to understand the basic spiritual law that, ‘actions establish connection between the spiritual and the physical domains’. This is very pertinent insofar as (kosher) sexual acts are concerned. First, due to the act’s intrinsic ‘creative force’; next to it’s active spiritual component, and finally, in the Torah’s great emphasis on sexual purity as a true path to kedusha. When properly united in the sexual act – in accordance to the halachot, and thus using the physical energies correctly for they are the physical form of the ‘spiritual energies’ – the married couple realizes its potential for great spiritual connection and ascension. Through the couple’s holy union with the kavanah (intention) of connecting to Hashem (dvekut) in a manner of ‘altruistically returning joy to Him’ in their fulfillment of the mitzvah of union and procreation, then an answer of ‘light above’ in the celestial levels is truly elicited. In Kabbalah, this is a metaphor for subject of Ohr Hozer (Returning Light) – something of great importance in the celestial dynamics of the diffusion of the Ohr Ayin Sof (Hashem’s light) throughout the Olamot (worlds), in particular as it relates to the Malchut of Olam HaAsiyah (our physical universe). Basically, the sefirot lights are diffused from above to below, and return from below to above. All of this “spiritual system” of illumination converges onto our physical world. The (positive) cycle of illumination depends on the actions and intentions of man. Without the union of the appropriate actions (the mitzvot) with correct intentions (the kavanot), the “reverberation” of spiritual energy, the part of this cycle that emanates from the Creation towards theHashem is damaged and hindered chaz v’shalom. As the Tikkun HaOlam actually depends on this “spiritual process”, it is then essential for man to ‘correct his behaviors and intentions’ in order to do his part in returning light to G-d, as this causes tikkunim to occur, elevating thus the physical and spiritual olamot. In this manner, a “partnership” is established between G-d and man, helping with the purpose of Creation: to sanctify and reveal Hashem’s glory in the inferior world, where He is naturally negated. Truly, without these desires for the “returning spiritual light” and the spiritual ascensions of the world, humanity is destined to moral degeneration and an unilluminated existence.