Contradiction with Proverbs 27:1
Proverbs 27:1 advises not to boast about tomorrow, mirroring James 4:16's admonition against boasting.
Proverbs 27:1: Boast not thyself of to morrow; for thou knowest not what a day may bring forth. [to...: Heb. to morrow day]
Paradox #1
The contradiction might arise if people interpret the verse as discouraging any form of planning or confidence in future success, which could conflict with the idea of setting goals and working towards them responsibly. However, the verse is more about cautioning against arrogance and presumption, so this could be a misunderstanding.