The Zohar, Chapter “Miketz (At the End),” Item 161: “And he put them all together in prison for three days.” These three days correspond to the three days of Shechem, as it is written, “And it came to pass on the third day, when they were in pain.”
The third day is always connected with pain. It is the hardest day in the process of correction because it is the day when the mutual inclusion of the right and left lines occurs. It is not like the first day, which is all about the right line and when we arm ourselves with the power of bestowal, nor is it like the second day, which is all about the left line, when we check which of its parts we can connect with the desire to bestow. The third day is about the reciprocal inclusion of one property into another, which results in the creation of a new, intermediate property.
Reciprocal inclusion exists only in spirituality; it never happens in our world. In this world there exists only one type of connection – when two objects unite. For example, the first object contributes its intellect whereas the other one donates emotions. They connect and replenish each other. This happens because in our world everything possesses only one property – the will to receive. Therefore, all inclusion in our world occurs only within this one property, which takes on various aspects and forms.
Mutual inclusion in spirituality, however, means that something brand new emerges – a third entity comprised of the first two. This is, in fact, a completely new phenomenon that didn’t exist previously. This “something” is called the Soul, the Human, or Adam.