The attribute of mercy (Hesed) accompanying the entire process of evolution is attained from all the bitter, opposite states experienced by the created being. These states are exactly what compel us to rise above ourselves and embrace mercy and judgment, bestowal and reception.
The creature is an accumulation of an infinite range of shades that lie between reception and bestowal; with their help the creature reveals the Upper force that preceded and created it. To be a creature independent from and similar to the Creator, to attain Him in full, it must contain its own system and that of the Creator, in a way that both of these systems completely coincide with each other.
The creature is a complex mechanism, but its complexity is the result of its imperfection. Perfection lies in simplicity. The Upper Light is simple; it is the pure quality of bestowal. However, the creature itself cannot be equal to the Creator except in its outer form, while within, it remains the desire to be filled.
From the 1st part of the Daily Kabbalah Lesson 10/12/10, “The Matter of Mercy”