The three regular prayers are so routine that one does not really concentrate during them – which is not the case if each person would contemplate in solitude his own plight... then he would pour out his heart like water to Hashem. Such a prayer would emerge with very deep intent with a broken heart and with great humility. Such a prayer will certainly not go unanswered…!” (Kuntrus Likutei Amarim, chapter 10).
Just as Hashem listened to the groaning voices of Bnei Yisroel in Egypt, so will Hashem listen to our cries today. In the merit of that prayer and crying, Hashem will speedily bring the Redemption, as is written (Zohar volume 2, page 12b),