Faithfulness See also Commitment; Courage; Dedication; Dependability; Diligence; Faith; Faithful; Loyalty; Obedience; Perseverance; Steadfastness; Trustworthiness; Truth; Worthiness faithfulness the girdle of his reins, Isa. 11:5 (2 Ne. 21:5; 30:11). thy counsels of old are faithfulness and truth, Isa. 25:1. victory and glory is … through your diligence, faithfulness, D&C 103:36. know that thy faithfulness is stronger, D&C 121:44.