1 Peter 5:6:

Humble yourselves therefore under the mighty hand of God, that he may exalt you in due time:

See also:

Should I Ask God to Use Me or to Make Me Usable?
Objection: God Wouldn’t Heal Paul’s Thorn in the Flesh
Objection: Sickness, While Unpleasant, Is Used by God to Build Character
Objection: God Uses Sickness to “Break” Us
Objection: God Clearly SENT Plagues in the Old Testament.  We Cannot Say That God Never Makes People Sick, Because He Obviously Did.