The Book of Proverbs is a book of practical wisdom and is still relevant.
Do not boast about tomorrow,
What a timely word for the Word.
It was almost 1,000 years after these words were penned that the Lord Jesus Christ said:
". . . do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own."
Proverbs cautions us to be ever mindful that the Lord is in control of tomorrow as well as today, therefore we should be thankful for what we have today. Jesus calls us to bare in mind that the Father knows what we need, even before we do! Both texts, along with the rest of the Scriptures, call us to trust the Lord with our whole being.