The right is the aspect of Abraham and the Left is the aspect of Isaac. From Abraham came Ishmael with negative aspects and Isaac with righteousness and total commitment to the Light. From Isaac came Esau with negative aspects and Jacob with righteousness and purity.
The other side (Sitra Achra) uses the negative aspects of the two columns to create confusion and chaos in the world until the time of Mashiach. Mashiach ben Yosef will take revenge on Ishmael, meaning the cleansing of the left column. Mashiach ben David will take revenge on Esau, which is the cleansing of the right column.
Moses will open the central column from the upper gate of Da’at and will take revenge on the Erev Rav, which are the souls of the mix multitude that Moses allowed to join the Israelites when they left Egypt. Because they are mix of good and bad, Moses will cleanse them with the power of the good side of the right and left columns.
Rabbi Ashlag adds in the ‘Sulam’ commentary that the process of the Redemption will not be completed until the soul of Moses is revealed. His soul includes both Machiahs and the revelation is through the Torah secrets that come from the Zohar. This gives power to Mashiach ben David and Mashiach ben Yosef to break all the Klipot in the world.
Every study of the Zohar reveals secrets of the Torah and support the coming of Mashiach. When we share our Kabbalah and Zohar studies with our friends we directly help in creating greater opening of light and expedite the coming of Mashiach. It can happen soon if we push ourselves to share and expose more people to this knowledge and Light.