For the best commentary on the Arabic Kabbalah, see Ibn 'Arabi's explanations in
The Meccan Revelations, especially the second volume translated by William Chittick and James Morris.
Kāf ک/ك, the eleventh Arabic letter with the value of 20, reminds us of Surah al-Kahf الكهف "The Cave." This Surah teaches about the nature of the mind, the crown of our head, that must be illuminated by ש or ش Shin, the sexual fire.
Replace ﻫ Ha, the fifth Arabic letter signifying karma and the breath of pranayama, with ش Shin, through alchemy, and you spell كشف Kashf, a synonym for "unveiling," or mukashafah. This is the level of inspirational knowledge in the three stages of initiation: imagination, inspiration, and intuition.
Therefore, lash your fornicating, adulterous egos with the whip of willpower, so that الكهف al-Kahf, the cave of your head, crown / mind (wherein the monsters of adultery lurk) might be purified and illuminated. For as Nietzsche wrote, "You go to women? Do not forget the whip!"
The Mysteries of Arcanum 11 demonstrate how man and woman, symbolized each by the number 1, develop the forces of "Persuasion" through overcoming the Lion of Katancia. The number 1 is willpower, therefore, in order to control one's Kāf ک/ك, crown, both man and woman must cooperate in alchemy, therefore unifying as the eleventh Arcanum of the Tarot.
If you are married, lash your egos 100 times through the esoteric age of 100, the First Initiation of Major Mysteries, through the help of four witnesses (since husband and wife both possess the two witnesses Ida and Pingagla within an alchemical marriage).
If you cannot procure four witnesses (through a matrimony), then lash the egos bearing false witness eighty times (practice transmutation with the Holy Eight as a bachelor and punish your lust by not feeding it).
This is how, through the 24th Surah of the Qur'an, the 24th arcanum of the Tarot (The Weaver) that we weave the garments of light, al-Nur, the solar bodies, through fulfilling the sixth commandment: "do not fornicate, but practice scientific chastity," for 2 + 4 = 6: Tiphrereth, the heart, our willpower.
Remember that the light, al-Nur, merges from the sexual seed, the Nun ن, which some state is the Arabic letter or inkwell through which the Pen of Allah writes creation: the complete human being. The diacritical mark above the inkwell of ن Nun bears resemblance to the Hebrew י Yod, the Shakti-potential of the sexual seed.
However, the Qur'an literally stipulates that it is lawful for men and women who practice scientific chastity to marry. Fornicators are for fornicators, and gnostics for gnostics. Nietzsche says the same thing in his chapter "On Child and Marriage."