Enduring comprises a strong activity of the soul, namely, a vigorous grasping of and clinging to the good; and only from this stout-hearted activity can the strength to support the physical and spiritual suffering of injury and death be nourished.

The Four Cardinal Virtues: Human Agency, Intellectual Traditions, and Responsible Knowledge (ed. University of Notre Dame Pess, 1990) - ISBN: 9780268089894