Who said "The sickness unto death is the sickness of the self."?

This quote is attributed to Kierkegaard, Søren.

The sickness unto death is the sickness of the self. - Kierkegaard, Søren

"The sickness unto death is the sickness of the self."

Kierkegaard, Søren Philosophy

Philosopher-Theologian Danish 1813–1855

"Life can only be understood backwards; but it must be lived forwards."

"The most common form of despair is not being who you are."

"Faith is the highest passion in a human being."

"Once you label me, you negate me."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."