indispensableness

In professing to indicate a short and easy method of confuting Tindal, he laid emphasis on the indispensableness of Christianity as a mainstay of social order.

Within both the Anglican and Protestant churches, Newman's influence was great, but in a different direction, viz, in showing the necessity of dogma and the indispensableness of the austere, ascetic, chastened and graver side of the Christian religion.