Answer: Unleavened bread (Matza) is a connection between Malchut and Bina from which a person has nothing but the ability to revive his soul. And he is ready for this. The poor bread becomes fulfillment for him.
This means an internal readiness: You are still in Egypt, in exile, but are already ready for redemption. This illumination called Matza enlivens your soul, and you are ready and agree to it.
All of the efforts that are invested by us in Egypt are designed to give us the feeling of exile and to awaken the desire for redemption, as it is written, (Exodus 2:23) “…and the children of Israel sighed from the labor.” When we reach the end of the period of the exile in Egypt, either by way of “I will hasten it” or by the way of “in its time,” for most this is through a combination of both called “land”; the Light comes from above and raises our desire to enjoy the sparks above. And this is redemption.
From the 4th part of the Daily Kabbalah Lesson 3/27/14, Writings of Baal HaSulam