Contradiction with Proverbs 27:1
Jeremiah 48:14 speaks of boasting to strength, whereas Proverbs 27:1 warns against boasting of what one will do, emphasizing uncertainty.
Proverbs 27:1: Boast not thyself of to morrow; for thou knowest not what a day may bring forth. [to...: Heb. to morrow day]
Contradiction with James 4:16
Jeremiah 48:14 encapsulates boasting, whereas James 4:16 calls all boasting evil.
James 4:16: But now ye rejoice in your boastings: all such rejoicing is evil.
Contradiction with Proverbs 16:18
Jeremiah 48:14 implies a confident boast in valor, while Proverbs 16:18 warns that pride goes before destruction.
Proverbs 16:18: Pride [goeth] before destruction, and an haughty spirit before a fall.