It's common to all of us. It's referred to as the darkness of the soul. The expression is linked to a 16th-century poem written by a Spanish monk.

The dark night of the soul is more than depression or a crisis in life. It is related to a crisis of faith that leads to hope and meaning in life.

While in it, it's easy to focus on the darkness itself—a time of spiritual depression—but there's light at the end of the tunnel when we turn our hearts to God.