To become one with another person, you must first recognize that you are but a broken half. Only then can you give all of yourself and become whole.

To become one with the Infinite Light, you must know you are but a broken half, the Infinite Light is your other half, and only then can you give all of yourself and become whole.

Pekudei 5741:61-62; Torat Menachem 5749 vol. 2, pg. 180.