“A message that merely advocates morality and compassion remains sub-Christian even if the preacher can prove that the Bible demands such behaviors. By ignoring the sinfulness of man that makes even our best works tainted before God and by neglecting the grace of God that make obedience possible and acceptable, such messages necessarily subvert the Christian message. Christian preachers often do not recognize this impact of their words because they are simply recounting a behavior clearly specified in the text in front of them. But a message that even inadvertently teaches others that their works win God’s acceptance inevitably leads people away from the gospel.
Moral maxims and advocacy of ethical conduct fall short of the requirements of biblical preaching…
A textually accurate discussion of biblical commands does not guarantee Christian orthodoxy. Exhortations for moral behavior apart from the work of the Savior degenerate into mere pharisaism even if preachers advocate the actions with biblical evidence and good intent.”
Bryan Chapell, Christ-Centered Preaching, pp. 268-269