Scripture, sufficiency of

Scripture is presented as being of itself sufficient for faith and for life.

God's written revelation is sufficient

Deuteronomy 4:1–2 See also Deuteronomy 12:32; Joshua 1:7–8; Proverbs 30:5–6; Jeremiah 26:2

Hear now, O Israel, the statutes and ordinances I am teaching you to follow, so that you may live and may enter and take possession of the land that the LORD, the God of your fathers, is giving you. You must not add to or subtract from what I command you, so that you may keep the commandments of the LORD your God that I am giving you.

The NT records the completion and fulfilment of the OT

Hebrews 1:1–2 See also John 12:47–50; Ephesians 2:20

On many past occasions and in many different ways, God spoke to our fathers through the prophets. But in these last days He has spoken to us by His Son, whom He appointed heir of all things, and through whom He made the universe.

Warnings against turning from, or adding to, the apostolic gospel, as set forth in Scripture

Revelation 22:18–19 See also Galatians 1:6–9; Colossians 1:25–2:8, Colossians 2:18, Colossians 2:20–23; 2 Thessalonians 2:1–2

I testify to everyone who hears the words of prophecy in this book: If anyone adds to them, God will add to him the plagues described in this book. And if anyone takes away from the words of this book of prophecy, God will take away his share in the tree of life and the holy city, which are described in this book.

Descriptions of Scripture point to its sufficiency

Scripture is good

Romans 7:12 See also 1 Timothy 1:8

So then, the law is holy, and the commandment is holy, righteous, and good.

Scripture is perfect

Psalm 19:7 See also Psalm 119:142; James 1:25

The Law of the LORD is perfect, reviving the soul; the testimony of the LORD is trustworthy, making wise the simple.

Scripture is eternal

Psalm 119:89 See also Matthew 5:18, Matthew 24:35; 1 Peter 1:24–25; Isaiah 40:6–8

Your word, O LORD, is everlasting; it is firmly fixed in the heavens.