108 = 1 + 0 + 8 = 9: Yesod, the Foundation.

50 Kabbalistically relates with the Hebrew letter נ Nun, which is the sperm, the fish.

It is through our the נ Nun, the fish, the creative energy, within the מ Mem, the waters of life, that we will achieve mystical death. Let us remember that a true nun within a convent practices transmutation and mystical death in conjunction with sacrifice for humanity.