1 Corinthians 8:11

Paul explained what had taken place in such a situation. The knowledgeable Christian had by his knowledge of what he considered legitimate, and by acting on the basis of that knowledge alone, destroyed his brother’s relationship with God. "Ruined" seems strong, but Paul evidently anticipated the weaker brother returning to idolatry, the next step after participating in a feast in an idol temple. The apostle stressed the value of the weaker brother by referring to the fact that Christ died for him. Therefore the stronger brother dare not view him and his scruples as insignificant or unimportant.