At our 2008 National Conference, Sinclair Ferguson connects the way we talk to the ministry of the Word in our lives:
Here's an excerpt:
The most important single aid to my ability to use my tongue for the glory of the Lord Jesus Christ is allowing the word of God to dwell in me so richly that I cannot speak in any other accent.
Dear brothers and sisters, that's why it is so important for you at the practical level to be under a ministry of the Word where the Word of God is really preached, and preached in the grace and truth of the Holy Spirit.
Watch, listen, or download the whole sermon, "The Tongue, the Bridle, and the Blessing: An Exposition of James 3:1-12."