Metaphor: The pain of child birthing is what causes the baby to be born. Similarly, the pain of Galus is what causes Geulah to be "pulled into reality".
Maamer Admor Hazaken 5563
Maamer Admur Hazakein - 5562 V2 - Parshas Vayigash
Maamer Admoir Hazakein 5562 - Episode 4 - Pages 6 - 8
Maamer 5562 Shabbos Shuva 3 - Pages 4 & 5
Turning the light on just reveals that which was always there. Text based Maamer - Shabbos Shuvah 5562 - Pages 2 and 3.
Maamarei Admor Hazokein 5562 - Episode 1 - Text Based - Shabbos Shuvah - the first Maamer in volume 1