Titus 2:6…”In your teaching show integrity, seriousness and soundness of speech that cannot be condemned.” Continuing on the theme of being careful of which teachers we follow, this verse lays out some additional considerations. Any pastor/elder must be careful how they live, or their message will not be credible. 1 Corinthians 8 is a great reminder, particularly that knowledge alone isn’t sufficient if it’s not used to build others up spiritually.
Seriousness is also important because when we teach others that its appropriate to approach God as your “bro” or “buddy” it opposes what the bible teaches. Anytime anyone in the bible has an encounter with God, it brings about tremendous awe and people fall face down. In Ezekiel 1, this is exactly what we see after his vision ‘of the likeness of the glory of the Lord’ in verse 28. Further, when angels of the Lord appear in scripture, they almost always say “do not be afraid,” which means they elicit reverence. We can certainly approach the throne boldly in Christ, but it also needs to be done with reverence and awe, and never casually. A casual teacher, with casual views of God, will have casual views of scripture, and therefore produce casual Christians. Jesus would call casual followers of Him goats (Matthew 25:31-33), and therefore we need to flee from teachers who present God and His word in a casual way.
Soundness of speech includes consistent, clear teaching, which allows the bible to speak for itself. Carefulness in not taking verses out of the context of the passage, book, testament, and bible as a whole is extremely important. Check any teaching which uses single verses as theological swords, and be sure to understand everything you read and hear in context.