“The Zohar tells us that the nun stands for ona’ah—deceit. To the human eye, this world seems to be controlled by the laws of nature, for one cannot see G-d. This false reality, therefore, is a total deception.
The mission for all of us is to reveal and draw G-d’s infinite light down into this world so that we can see the true reality of the world—that everything is G-dliness and G-dliness is everything. This is done by cleaving to G-d and observing His commandments.
This concept is expressed in the straight, long (final) nun, which has a design similar to the vav, a chute. In contrast to the vav, however, its leg extends beneath the baseline. This implies the downward flow of Divine energy reaching into even the deepest abyss. This will ultimately happen with Mashiach’s arrival.”