Question: How can I reach infinity (unlimitedness, unboundedness) through a path of restriction?
Answer: Suppose you wish to give me many fulfillments, but I only want to receive something specific. So, you restrict your great desire to bestow and give me what I want. I receive from you in a circular form according to my desire, but your action of bestowal toward me was restricted, that is, in the form of a straight line. This is called “the bond of a circle and a straight line” (a sphere and a tube), but, if you don’t restrict yourself at all because whatever I want does not constitute a restriction for you since you do not think about yourself whatsoever and all your thoughts are about how to fulfill my desire, then any opportunity to bestow is infinity for you even if you give me only what I desire, and, for me, it is also infinity because I receive everything I desire.
In other words, there are no lines or circles in our relationship, but only that which we determine for ourselves, the measure to which each of us is included in the other’s desire. If my desire is determined only by your desire, then I always remain in infinity. There are rules in which desire determines action: 1) What’s mine is mine, what’s yours is mine, 2) What’s mine is mine, what’s yours is yours, and 3) What’s mine is yours, what’s yours is yours.
From the lesson on October 15, 2010, The Study of the Ten Sefirot