An uncontrolled tongue exposes a spiritual problem. A true Christian has to use the tongue in a kindly way, a gentle way, a non-argumentative way, a benevolent way, a polite way, a considerate way, in an unselfish way and in a way that will be pleasing to both God and fellow man. We should edify, not destroy. We should follow the wise instruction in Romans 14 v 19
which states “Therefore let us pursue the things which make for peace and the things by which one may edify another.”