St. Catherine of Siena

I have shown you, dearest daughter, that in this life guilt is not atoned for by any suffering simply as suffering, but rather by suffering borne with desire, love, and contrition of heart.  The value is not in the suffering but in the soul's desire.  Likewise, neither desire nor any other virtue has the value or life except through my only-begotten Son, Christ crucified, since the soul has drawn love from him and in virtue follows his footsteps.  In this way and in no other is suffering of value.

The Dialogue, page 29