The Teshuva of the Chief of Forgetfulness - Nasi LeBnei Menashe – the Chief leader of the tribe of Menashe – Gamliel Ben PedaTzur –
The Apta Rav taught that realm of Teshuva is very high and lofty and it is unattainable and beyond the reach of many individuals. So then, you could ask, how do we open the gates of Teshuva and repentance? The answer is, through the righteous tzadik.
If the tzadik is constantly attached to Avodas Hashem with no interruptions whatsoever, then his very self and his very existence could be nullified because of his great attachment to Hashem with such fierce love and devotion. Therefore Hashem has caused that the tzadik should sometime falter and fall down from this lofty level so that this should preserve him and keep him alive. This occurs by some foreign or inappropriate thought that clashes with his lofty spiritual level. Then immediately the tzadik picks himself back up and repents and does Teshuva. He bangs and hammers on the gates of repentance seeking to pry them open so that his Teshuva will be accepted on High and that his mistake will be forgiven and absolved for the sin of (Devarim 6:12) “Be careful and guard yourself lest you forget Hashem”.
Through his Teshuva he then uplifts together with himself all the mistakes and blemishes the wicked have done and he inserts the desire for repentance and Teshuva into all the hearts of people even those who have fallen into the deepest pits of despair. Therefore the gates of repentance are opened for everyone though the Tzadiks’ forgetfulness, therefore such a tzadik is nicknamed Menashe, which means to forget.
The entire world is thus uplifted through the tzadik’s forgetfulness and his subsequent Teshuva, therefore he is call Nasi or the uplifted one, the Nasi LeBnei Menashe. . . Gamliel Ben PedaTzur – The tzadik realizes that this forgetfulness occurs because he has fallen from his level, then he recognizes that even those who have fallen even into the darkest deepest pits of despair still are able to return and repent and find salvation even down there in their hearts they can still say “Gamliel, - Gam Li E”l – I too still believe in G-d!” Thus he has fallen in order to uplift others back up with him, thus he is called Ben PedaTzur – Hashem who is the Tzur or Rock of Israel Podeh – redeems them and the sparks of holiness who have all fallen down into the deepest pits of darkness. (Ohev Yisroel Parshas Naso)