“The soul will cleave …” Isaac of Akko, Otsar Hayyim (in manuscript); see Matt, The Essential Kabbalah, 112, 201. “More than the calf wants to suck, the cow wants to suckle” is one of five things that the imprisoned Rabbi Akiva taught Rabbi Shim’on bar Yohai; see Babylonian Talmud, Pesahim 112a.