All changes happen by virtue of the Light that reforms. Therefore, lowering yourself means doing everything possible from your end (which is called a prayer) so you will value the quality of bestowal and elevate it much higher than any reception, and so any reception would be despicable, while bestowal would be holy in your eyes.
Then you will want it! And to the degree of your desire, you will attract the Light that reforms, which will create the structure of the spiritual Partzuf in you: the head (Rosh), meaning bestowal will be above, whereas the body (Guf), reception – below. The head is on top, above everything, which means that even reception below, in the body, takes place for the sake of bestowal. This is the right spiritual Partzuf.
From the 1st part of the Daily Kabbalah Lesson 12/26/11, Writings of Rabash