"We can ignore even pleasure. But pain insists upon being attended to.
God whispers to us in our pleasures, speaks in our conscience, but shouts in our pains:
It is His megaphone to rouse a deaf world...
No doubt pain as God's megaphone is a terrible instrument;
it may lead to final and unrepented rebellion.
But it gives the only opportunity the bad man can have for amendment.
It removes the veil; it plants the flag of truth within the fortress of the rebel soul."
~C.S. Lewis, The Problem of Pain