Paul gives instructions on difficult issues in the church and how to apply principles of Christian liberty to those issues: eating food sacrificed to idols, how to observe the Lord's Supper, and how those who are stronger ought to regard those who are weaker in the faith. The issue is not what is right or wrong, but what glorifies God, what leads to the salvation of others, and what profits others. Paul will spell out later that these principles must be expressed in love.