What comes out of our mouth makes us unclean – Luke 6:45
stories, foul talk and course jokes are out of place in a Christian’s conversation because they don’t reflect God’s nature within (Eph 4:29, 5:4). Hence the exhortation to, "Rid yourself of...filthy language from your lips" (Col 3:8). The tongue is very difficult to control, especially when you are tired, frustrated or around others who do not hold to god-honouring principles (Isa 6:5; Jas 3:2-12).
We must not misuse God’s name, with common expressions, such as ‘Oh my God’ (Ex 20:7).