" [H]ealing displays the works of God in John 9,
and sustaining grace displays the works of God in 2 Corinthians
12. What is common in the two cases is the supreme value
of the glory of God. The blindness is for the glory of God. The
thorn in the flesh is for the glory of God. The healing is for his
glory, and the non-healing is for his glory.
Suffering can only have ultimate meaning in relation to God. "
― John Piper , Disability and the Sovereign Goodness of God