"teaching...one another..." - Colossians 3:16Like instructing, teaching should not come from ignorance, but "in all wisdom." Wise teaching stems from letting "the word of Christ dwell in you richly" (Colossians 3:16).
The verse continues "singing psalms and hymns and spiritual songs." As the ESV Study Bible explains, these musical components are a means of teaching one another. Doctrinally-sound lyrics are a form of teaching God's truth. Could this then translate into other arts like biblically based literature and visual arts? There are many ways through which we can teach truth.