Rabbi Shimon Bar Yochai

“ At that time when that nekudah goes up in the two yarkhei (thighs) , two arms receive her, which are two upper neharot, and bring her up in the Central Pillar, and this is nas'u neharot kolam (Ps. 93:3) , they let her two yarkhin go out to her husband, and the two arms receive her to her husband, and that's why two of the neharot it's said of them nas'u neharot Hashem" (went out) and the other two, yis'u neharot (brought up) . ”

“ SLSL"T (chain) is TRUA"H (tremolo, shaking alarm sound) the tie of the two, the face of the lower ShWR"Q. In SLSL"T it ascends, in ShuR"Q it descends; one is a ladder (o.v. ChL"M) that goes up, and the other is a ladder (o.v. ChiR"Q) that goes down, behold DRG"A TR"Y TAM"Y ("stepping, two taamim") . ”