A Jew with a lev nishbar (broken heart) wants to talk with Hashem. A depressed person does not want to talk with anyone. After cleansing ourselves during our daily conversation with the Creator we should feel a tremendous simcha (joy). Depression is to be avoided under all circumstances. We should always come to davening (prayer) with energy and simcha (joy). Even faking simcha can open our heart. On Rosh Hashanah we must be joyous. At end of time we must hold onto a tzaddik (righteous person) when the world starts to shake.