Reliable steadfastness over time. God's primary character toward His covenant (great is thy faithfulness, Lam 3:23) and the character He produces in His people. Hebrew emunah and Greek pistis both carry the dual sense of faith (active trust) and faithfulness (covenantal reliability). The same word that names the believer's faith in Christ names Christ's faithfulness to His promises. God's faithfulness is the bedrock: He is faithful that promised (Heb 10:23); he abideth faithful: he cannot deny himself (2 Tim 2:13). The Spirit produces faithfulness as fruit (Gal 5:22), and faithfulness is the chief required quality of stewards (1 Cor 4:2: Moreover it is required in stewards, that a man be found faithful). The biblical man's faithfulness shows in long-arc consistency — same direction over decades, kept marriage, kept word, kept post. Christ's commendation well done, thou good and faithful servant (Matt 25:21, 23) is the destination toward which Christian faithfulness aims.