Both texts, responding to human emergencies, came to be regarded as political and social as well as spiritual classics.

The Disappearance of the Universe has been received with reviewer reactions ranging from great scorn and disbelief to predictions of one day becoming a "spiritual classic".

It deserves to become a spiritual classic.

His books are considered spiritual classics.

He is also rumoured to have translated a number of spiritual classics, including the books of Paramahansa Yogananda.

As the most popular spiritual English classic, it helped to form the religious outlook of Catholics in England right up to the Reformation.

Commentary on Black Elk Speaks as 'spiritual classic'

According to some, it has become a spiritual classic, helping readers to steer clear from the trappings of intellectualism.

Plough published spiritual classics, inspirational books, and children's books, many of which are still available as free downloads.

Christianity Today calls Still "an instant spiritual classic."