"Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him." (John 9:3)
In "Biblical Perspective" Gayle Woods writes:

Jesus opened their eyes to a thought which they never would have considered. There was no connection between infirmity and sin in this situation. The infirmity could not be blamed on the parents or the son. In spite of the bad situation, God would gain glory through their lives. God is often able to use us to the greatest extent when we are at the end of our resources. He takes that which is low, insignificant, and undesirable and uses it for His glory.

Discussion: Even today, many atttribute various diseases and calamities in life to people's sin. Why do we try to make this link?
Discussion: What if our link between the hardship people experience and their sin is inaccurate? What are the implications?
Source: Miracles of Jesus: Adult Teacher's Insights, page 47.