Salvifici Doloris §13

13. But in order to perceive the true answer to the "why" af suffering, we must look to the revelation of divine love, the ultimate source of the meaning of everything that exists. Love is also the richest source of the meaning of suffering, which always remains a mystery: we are conscious of the insufficiency and inadequacy of our explanations. Christ causes us to enter into the mystery and to discover the "why" of suffering, as far as we are capable of grasping the sublimity of divine love.

In order to discover the profound meaning of suffering, following the revealed word of God, we must open ourselves wide to the human subject in his manifold potentiality. We must above all accept the light of Revelation not only insofar as it expresses the transcendent order of justice but also insofar as it illuminates this order with Love, as the definitive source of everything that exists. Love is: also the fullest source of the answer to the question of the meaning of suffering. This answer has been given by God to man in the Cross of Jesus Christ.