"For some time I have been struggling with an inner conflict. A mighty force impels me to speak about teshuvah [penitence]. All my thoughts are focused on this theme alone. Teshuvah holds a primary place in Torah and in life; all the hopes of the individual and of society depend on it."

So begins Rav Kook's introduction to Orot HaTeshuvah ('Lights of Penitence'), perhaps his most popular work, first published in 1925. The compact book was beloved by its author, and he himself studied it during the month of Elul after morning prayers. One student related that he heard Rav Kook say, 'I worked extensively on Orot HaTeshuvah. Whoever studies it properly will find light in every word.' He also declared that Orot HaTeshuvah 'must be studied without end.'

What is so special about the book's outlook on teshuvah?

Teshuvah — a Return to Life

Orot HaTeshuvah illuminates the concepts of sin, punishment, and penitence. Sin primarily harms the sinner by cutting him off from the roots of his existence, from the light of his soul. This estrangement is sin's worst punishment. Teshuvah, on the other hand, redeems the sinner from his darkness. It rejuvenates him, returning him to his previous state of life and joy.

The word teshuvah literally means 'return.' It is not a flight from the world or daily life. On the contrary — "Precisely amidst genuine, pure teshuvah, we must return to the world and to life" (Orot HaTeshuvah 14:30).

Already in his introduction, Rav Kook indicated that he saw teshuvah as an underlying force impacting all aspects of life, not only the realm of the sacred. "Teshuvah holds a primary place in Torah and in life." 

Additionally, Rav Kook posited that this powerful force is not limited to the failings and triumphs of the individual. It also applies to failures and successes in the life of the nation and the entire universe. "All the hopes of the individual and of society depend on it." 

The Spiritual Revival of the Nation

Rav Kook firmly believed that a secular national revival, an entire program of building the land and the nation, cannot not take place without a corresponding revival in holiness, with manifestations in both personal and public life.

But which path will lead the generation of rebirth to the gates of teshuvah? The routine approach and run-of-the-mill outlook are doomed to failure. The people of such an idealistic generation, brimming with life, energy, and creativity, cannot be reached with a severe demeanor and punctilious demands of mundane, everyday deeds — demands that they would look upon as indicating a weakness of soul and spirit.

No, such a generation must be awakened with a positive spirit of greatness and courage. Teshuvah, Rav Kook taught, "comes not to embitter life, but to make it pleasant" (15:6). "Teshuvah is essentially a return to one's origins, to the source of supernal life and the fullest existence" (12:8).

In an article printed in HaYesod in 1934, he explained:

"Teshuvah is the great key to redemption. Many things inhibit teshuvah, but the major obstacle, particularly to collective teshuvah, is the misconception that teshuvah means the soul's atrophy, the enfeebling and debilitation of life. This false image also impairs the teshuvah of the individual. But even more, it hinders collective teshuvah, the teshuvah of the nation.

"We must reveal the secret that the genuine teshuvah of the entire nation of Israel is a mighty, powerful vision. It provides reserves of might and strength; it imbues all of our spiritual and practical values with a lofty spirit of vigorous, surging creative power in the strength of the Rock of Israel. This living teshuvah flows not from isolated, fragmented souls, but from the treasury of the nation's collective soul, from Knesset Yisrael, which unites all of its farflung limbs ... Thus the complete soul of Israel is prepared to return to its former strength as in days of old."

(Adapted from Celebration of the Soul, pp, 26, 28-29. Mo'adei HaRe'iyah, pp. 52, 55)