Note that the "ain" is written in this as the Alap joined with the opposite facing "Y" (the adversary). Sometimes it appears without the Alap (16th letter under Estrangela):
The "Y" at the center of everything
and the "X"
According to Judaism, the “Ein Sof” or “Ayn Sof” is the entity of God prior to his “self-manifestation”.
I don't have to see to believe