You have dealt well with your servant,
O Lord, according to your word.
Teach me good judgment and knowledge,
for I believe in your commandments.
Before I was afflicted I went astray,
but now I keep your word.
You are good and do good;
teach me your statutes.
The insolent smear me with lies,
but with my whole heart I keep your precepts;
their heart is unfeeling like fat,
but I delight in your law.
It is good for me that I was afflicted,
that I might learn your statutes.
The law of your mouth is better to me
than thousands of gold and silver pieces. (Psalm 119:65-72, ESV)

My comment (in length and content) is greatly colored by my illness. But, I think that in whatever afflictions we (individually and corporately) go through, we learn ever further our fleshiness and worldliness in ourselves and---by God's grace---grow in Christ, in our trust in His Word.

What causes quarrels and what causes fights among you? Is it not this, that your passions are at war within you? You desire and do not have, so you murder. You covet and cannot obtain, so you fight and quarrel. You do not have, because you do not ask. You ask and do not receive, because you ask wrongly, to spend it on your passions. You adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God. Or do you suppose it is to no purpose that the Scripture says, "He yearns jealously over the spirit that he has made to dwell in us"? But he gives more grace. Therefore it says, "God opposes the proud, but gives grace to the humble." (James 4:1-6, ESV)

But if you bite and devour one another, watch out that you are not consumed by one another...For the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh, for these are opposed to each other, to keep you from doing the things you want to do...Now the works of the flesh are evident: sexual immorality, impurity, sensuality, idolatry, sorcery, enmity, strife, jealousy, fits of anger, rivalries, dissensions, divisions, envy, drunkenness, orgies, and things like these. I warn you, as I warned you before, that those who do such things will not inherit the kingdom of God. (Galatians 5:15,17,19-21, ESV)

The diagnosis of our condition is clear.

Submit yourselves therefore to God. Resist the devil, and he will flee from you. Draw near to God, and he will draw near to you. Cleanse your hands, you sinners, and purify your hearts, you double-minded. Be wretched and mourn and weep. Let your laughter be turned to mourning and your joy to gloom. Humble yourselves before the Lord, and he will exalt you. (James 4:7-10, ESV)

For we do not want you to be ignorant, brothers, of the affliction we experienced in Asia. For we were so utterly burdened beyond our strength that we despaired of life itself. Indeed, we felt that we had received the sentence of death. But that was to make us rely not on ourselves but on God who raises the dead. He delivered us from such a deadly peril, and he will deliver us. On him we have set our hope that he will deliver us again. You also must help us by prayer, so that many will give thanks on our behalf for the blessing granted us through the prayers of many. (2 Corinthians 1:8-11, ESV)

Brothers, if anyone is caught in any transgression, you who are spiritual should restore him in a spirit of gentleness. Keep watch on yourself, lest you too be tempted. Bear one another's burdens, and so fulfill the law of Christ. For if anyone thinks he is something, when he is nothing, he deceives himself. But let each one test his own work, and then his reason to boast will be in himself alone and not in his neighbor. For each will have to bear his own load. (Galatians 6:1-4, ESV)

We're all in this together, so we should keep preaching to one another and praying for one another (for the James passage, think corporately rather than individualistically).