What does אשה כי תזריע, giving birth have to do with the parsha of negaim which follows? The Gemorah in Sanhedrin (98b) cites an opinion that Moshiach is called a metzorah. Why is Moshiach given the title of the plagued, afflicted individual?
Onklus translates a nega tza'arat as סגירותא. A person that has a nega is closed up. The Kabbalists teach that a nega means that there is great spiritual potential within a person but it is locked inside and is not coming to the forefront. The metzorah is then secluded away from people so that he can meditate on his state and hopefully find the key to access the potential inside of him. The nega is a chance for the person to bring out that potential which is locked inside of him/ her self. That is like the woman who's pregnancy gives birth to a new child. Moshiach is called a metzorah because he can cultivate, activate and access the spiritual energy locked up within the nation.
Why do we celebrate the new moon if it is so small, we should celebrate the moon in its zenith, in the middle of the month? Why is the mitzvah of kiddush hachodesh given right before leaving Egypt? And what does it have to do with the rest of the parsha of Hachodesh which speaks of the laws of the Pesach offering? What we are celebrating is not the moon in its full glory but rather the potential for growth. The moon shrinks after it expends all of its potential. It needs a recharge to be able to expand again. Klal Yisroel was sitting at the brink of complete assimilation. Why should they be redeemed? Hashem was פוסח on the normal rules of the effort expected from Klal Yisroel and redeemed them because they had the potential for greatness. They may have retained only a sliver of themselves throughout their stay in Egypt but that was enough to grow into a great nation.
We say on Rosh Hashana היום הרת עולם, the world in pregnant with the opportunity for new growth. Every new chodesh, every new year is a time to look at the potential for future growth and to go from being metzorah, potential which is locked and squandered to the metzorah of Moshiach, to bring forth that potential.