It is said about Rav Moshe Teitelbaum zt”l, that his longing for Moshiach to come was incredibly intense. He is quoted as saying, “If I had known in my youth that in my old age Moshiach still had not come, I would not have physically survived due to the pain (his delay) would cause me. My soul would have left me. However, it is only because of my trust and hope in Hashem that he will come that I have survived until today. “ This is the delicate emotional balance we all strive for on Tisha B’av. On the one hand sad that we are still in exile, while at the same time looking towards the future hoping and believing that Moshiach will come.