The Catholic Church teaches us what suffering really is...

And how to live 'with' it, and accept it as God's will, if a healing or miracle is not given, and to offer it up for what is "lacking in the Passion of Christ * ... for the conversion of the world and the souls of poor sinners, and to even help those in the "suffering Church" (those in Purgatory) too. From Dr. Jeff Mirus

h/t TJ

* Now I rejoice in my sufferings for your sake, and in my flesh I do my share on behalf of His body, which is the church, in filling up what is lacking in Christ's afflictions. Col. 1:24