The Promise of Christ is not to the individual but to the Society: “I will build My Church – and the gates of hell shall not prevail against it.” It is not – ‘I will influence here and there separately, individually, alone this man and that man, and each by virtue of that influence will be able to resist evil.’ No, it is only by being part of the great organization with its priesthood, sacraments, doctrines that you will be secure from the attack of the evil ones… All our modern notions of solidarity, co-operation, socialism come in to verify this.

Stewart Headlam, The Meaning of The Mass, 57.