The Sixties Radical-Azriel

Before you were formed in the womb, your days were numbered and set in place. They are the chapters of the lessons you came here to learn, the faces of the wisdom this world has to teach you, the gateways to the treasures this lifetime alone can bestow.

A day enters, opens its doors, tells its story, and then returns above, never to visit again. Never—for no two days of your life will share the same wisdom.

Hayom Yom, 17 Cheshvan; Naso 5737:6.

http://www.chabad.org/library/article_cdo/aid/8083/jewish/Life-in-a-Day.htm