Regeneration not lawfulness.

17 But if you call yourself a Jew and rely on the law and boast in God 18 and know his will and approve what is excellent, because you are instructed from the law; 19 and if you are sure that you yourself are a guide to the blind, a light to those who are in darkness, 20 an instructor of the foolish, a teacher of children, having in the law the embodiment of knowledge and truth—21 you then who teach others, do you not teach yourself? While you preach against stealing, do you steal? 22 You who say that one must not commit adultery, do you commit adultery? You who abhor idols, do you rob temples? 23 You who boast in the law dishonor God by breaking the law. 24 For, as it is written, “The name of God is blasphemed among the Gentiles because of you.”
(ESV Romans 2:17-24)

Replace Jew with 'Christian' and Gentile with 'the World' and I think we have a timely reminder to everyone, but especially those who are called to preach the Word of God to make sure their lives live up to what they say.

Many Christians claim to be saved through Jesus alone yet still find some kind of law to attach themselves too.  I think we need to be constantly checking ourselves against sin - but not through legalistic means, but through allowing Jesus to continually make us aware through the Holy Spirit in a work of continued sanctification.   This then isn't legalistic but regenerative through our relationship with Jesus.  

Hopefully this would also avoid us living as we don't preach, because living by the law means we're constantly trying to find ways to work around it - thus becoming hypocritical.  But by living regeneratively we simply let Jesus work in our lives everyday and there is nothing to work around.

Oh Jesus continue to change me!