Contradiction with 1 Thessalonians 5:16-18
These verses encourage rejoicing and thanksgiving, which contradicts Jeremiah 8:21's expression of sorrow and astonishment.
1 Thessalonians 5:16-18: Rejoice evermore.
Contradiction with Philippians 4:4
This verse calls for continual rejoicing in the Lord, contrasting with the mourning and grief described in Jeremiah 8:21.
Philippians 4:4: Rejoice in the Lord alway: [and] again I say, Rejoice.
Contradiction with Psalm 30:11
This verse describes turning mourning into dancing, which is a contradiction to the mourning in Jeremiah 8:21.
Psalm 30:11: Thou hast turned for me my mourning into dancing: thou hast put off my sackcloth, and girded me with gladness;
Contradiction with John 16:33
Jesus speaks of having peace in tribulation, which contradicts the dismay and mourning expressed in Jeremiah 8:21.
John 16:33: These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.
Contradiction with Romans 5:3-5
These verses speak of glorying in tribulations because of the hope they produce, which opposes the lament in Jeremiah 8:21.
Romans 5:3-5: And not only [so], but we glory in tribulations also: knowing that tribulation worketh patience;