It is known that the beginning of the rectification that takes place by way of the ascent of Malkhut to Bina occurs in the world of Nekudim, which emerged after the partzuf of Sag of Adam Kadmon. Accordingly, the rectification of the three lines also begins from the world of Nekudim since one is dependent on the other. This is not the case for the first three partzufim of Adam Kadmon, galgalta, Ab, and Sag, which preceded the world of Nekudim.
The ascent of Malkhut to Bina had not yet transpired in them, and therefore they did not contain three lines but just one line.37The ascent of Malkhut to Bina that takes place in the second constriction only begins in the world of Nekudim. Since this ascent is the cause of the three “lines” or columns of light in the rectification of lines, the worlds preceding this ascent only have one column of light within them.