Everything happens for a reason, and the reason can be found in the parable of the sower in Mark 4. God called Paul to minister the Word to the Gentiles. His job was to sow, or plant, the Word. God has selected him for this purpose, and that is what he does. He travels all over the known world, taking the gospel with him. God is the ultimate sower, but God uses men to do it through the foolishness of preaching. Paul is a carrier of the Word; he is a spreader of the message.
Scripture shows you that just because you might have any kind of attack -including a financial problem, a health problem, a family problem, or any other kind of issue -this does not necessarily mean that the favor of God is no longer on you. It doesn't necessarily mean that you are not operating in faith.