Consistency

God's nature, plans and purpose do not change. The same consistent plan of salvation can be seen throughout the OT and NT, culminating in Jesus Christ who is “the same yesterday and today and for ever”. Believers are also called to show the same consistency in their faith and witness.

God's nature is consistent and unchanging

Malachi 3:6 See also Psalm 102:27; James 1:17

“Because I, the LORD, do not change, you descendants of Jacob have not been destroyed.

God's plans and purpose are consistent and unchanging

Psalm 33:11 See also Numbers 23:19; 1 Samuel 15:29; Job 36:5; Psalm 89:34; Titus 1:2; Hebrews 7:21; Psalm 110:4

The counsel of the LORD stands forever, the purposes of His heart to all generations.

God's plan of salvation is consistent

Genesis 12:2–3; Hebrews 6:17–18, Hebrews 13:8 See also Genesis 18:18, Genesis 22:17–18, Genesis 26:4, Genesis 28:14; Deuteronomy 18:15, Deuteronomy 18:18; Psalm 72:17; Jeremiah 4:1–2; Zechariah 8:13; Acts 3:23–26; Galatians 3:8

I will make you into a great nation, and I will bless you; I will make your name great, so that you will be a blessing. I will bless those who bless you and curse those who curse you; and all the families of the earth will be blessed through you.”

So when God wanted to make the unchanging nature of His purpose very clear to the heirs of the promise, He guaranteed it with an oath. Thus by two unchangeable things in which it is impossible for God to lie, we who have fled to take hold of the hope set before us may be strongly encouraged.

Jesus Christ is the same yesterday and today and forever.

Believers are to live lives consistent with their profession of faith

Ephesians 4:1; Philippians 1:27 See also Matthew 5:37; 1 Thessalonians 4:12; 1 Timothy 3:7; Hebrews 13:7; James 5:12; 2 Peter 3:11

As a prisoner in the Lord, then, I urge you to walk in a manner worthy of the calling you have received:

Nevertheless, conduct yourselves in a manner worthy of the gospel of Christ. Then, whether I come and see you or only hear about you in my absence, I will know that you stand firm in one spirit, contending together as one for the faith of the gospel,