All our sensations operate by measuring contrast since “everything is attained through comparison.” We recognize something only if it changes or moves, if there are differences between occurrences in terms of time, motion, power, and thousand other measurements. But we have to have them first!
Therefore, the Creator demonstrates Himself to us and gives us an opportunity to get to know Him through multitude of modifications that do not exist either in Him or in the will to receive (desire). But He must arrange billions of changes in the relationships between Him and the desire to receive so that the latter may get to know Him.
After all these changes, we attain contentment and completeness. But in order to achieve this and know the Creator, we have to go through them. All these modifications are artificially created by the Creator.
The desire to receive and the desire to give, reception and bestowal, Klipa (shell) and sanctity, are all created for a single reason: to give us an ever lasting impression of the Creator. Without it, we wouldn’t be able to recognize anything in the simple, white Light. We wouldn’t even know that it is “white.” It is impossible to pass to the creature unwavering perfection and permanence but only through infinite number of changes.
To a certain degree, it can be observed in electronics. In order to transmit some phenomenon, we must split it, divide it into a multitude of impulses or discrete data, and pass them on at high frequencies. With the help of such partition (discretion), transmission of multiple tiny modifications, their reception and further integration (unification), we can pass information through the communication lines.
Another person can also be known only by various changes you observe in him, by you encountering him or her, and not in any other way. But after you have collected all your impressions, you may say that now you know that person.
From the 2nd part of the Daily Kabbalah Lesson 10/17/10, The Zohar