If you have come to Christ, and repented of your sin, and found new life, it is because he has transformed you and saved you to make you a demonstration of the works of God. It should be so obvious to everybody who knows you that you are a changed man, a changed woman, that you are different, that your standards are different, that your tastes are different, that your longings are different, that your destination is different. You are on the heavenly road, that you are not of this world but you are of the next. You do not live for flesh and time and possessions and just earthly pleasure, but you live for God.
Has it gone wrong? Do we have to say: ‘I regret I am not much of a demonstration of the works of God. When I am attacked by problems or difficulties or setbacks, down I go and I am a complaining person. When I am insulted I react badly’? Do I have to say: ‘I am not a good demonstration of the works of God’? But that is what we are saved for. It is not just the man born blind.
There is a cause, of course, to all tragedy and all trial and heartache. It is sin generally. It is the fall of man. But no, in the case of this man, there was no specific cause.