If the Mashiach appeared now and suddenly revealed himself, Israel would become very frightened. Before the Mashiach comes, Klal Yisrael are in a very low state, heavily covered by a klipa. Their sensitivity to spirituality is dulled, their motivation to spirituality is very weak, and the sudden appearance of Mashiach would be threatening to them. There will be a specific action to raise Klal Yisrael out of the inyan of the klipos and give them an extraordinary sensitivity. There is additional dimension of a new spirit that comes down from the Heavens to us that suddenly every soul is activated and sensitized to a new level of Truth.