Breslov Basics – Hashem Can Forgive, No Matter What – Speaker: Rabbi Zvi Aryeh Rosenfeld ז”ל.
King Chezkiyahu’s son Menashe did so many evil things during his reign that the angels blocked his repentance. Therefore, to accept Menashe’s plea for forgiveness, Hashem carved a tunnel to His Throne that bypassed all the courts of heaven. This account is an encouragement to any sincere person that the path of return is always open.
Based on 2 Melachim 21, 2 Divrei HaYomim 33:13, and Midrash Yalkut Shemoni.
The entire shiur is HERE.