We don’t understand how two opposite phenomena can exist at the same time, how it is possible to receive and enjoy, and at the same time to give delight to the one who gives you pleasure. These feelings are opposite. So how can they be combined, if they are aimed at opposite directions: one towards me, and the other towards Him? How is it possible to simultaneously feel pleasure from two desires?
There are no examples of this in our world, because it is based on one desire alone, which is the egoistic desire. But in the spiritual world, there is an additional desire, the desire to bestow, and both desires work together.
But first, these two desires must go through a collision with each other. The will to enjoy grows and contradicts the will to delight. The harmony between them takes place in virtue of the third line, which isn’t just a connection of the two desires; it isn’t a comprise. Rather, the two desires – “for myself” and “for Him” – become one. The only way for this to happen is through the revelation of the Upper Light, which gives you the ability to understand opposites and connect them together.
(From the Preparation to the Daily Kabbalah Lesson)