The Zohar, Chapter “Pekudei (Accounts),” Item 525: These are the seraphim with six wings, which sanctify their Master three times a day. They are meticulous with the righteous as a hair’s breadth, and are poised to punish—in this world and in the next world—those who slight the man from whom they learned even a single matter in the Torah and are not respectful of him…
When we begin to ascend from this world to the levels of spiritual connection, our relationships receive these holy names either from the side of goodness or the side of evil. Either I love or I hate, and there are thousands of names that stem from my love or hatred: angels, seraphim, demons, and spirits, which came from the left or the right side, either out of hatred or love, and the connections between them.
All in all, two forces are being spoken about. After all, there is nothing except the force of reception and the force of bestowal. It is only that in our world we somehow find simple names for them, using the spoken language. But in spirituality they have exact names, according to the actions they perform, the forces and the coarseness (Aviut) of desire, which they activate, and according to the results they bring.
But all in all, the two forms of our relations are spoken about here: attraction and rejection, connection and separation. And between them there is our free choice, our exertion and efforts in using these two forces in order to continually strengthen our spiritual Kli (vessel), until all the forces of the shattering reveal the connection between us, which is 620 times greater than it was before the shattering.
From the 2nd part of the Daily Kabbalah Lesson 11/1/2011, The Zohar