Tisha B'Av (9th of Av) is a time to work on correcting our vision, seeing things in a real way. The greatness of Aharon was his ability to see the goodness in people and reveal the inner light of each person to themselves. What is the connection between Avraham and Succos? Especially during the time before Moshiach, the yetzer hara (evil inclination) causes us to forget our purpose in this world.