Passage
Boast not thy selfe of to morowe: for thou knowest not what a day may bring forth.
Boast not thy selfe of to morowe: for thou knowest not what a day may bring forth.
Proverbs 27:1 Boast not thy selfe of to morowe: for thou knowest not what a day may bring forth.
Proverbs 27:2 Let another man prayse thee, and not thine owne mouth: a stranger, and not thine owne lips.
Proverbs 27:3 A stone is heauie, and the sand weightie: but a fooles wrath is heauier then them both.
The verse centers on "boast", "selfe", "morowe", "thou", "knowest", "bring", and "forth". It is saying that the verse draws attention to "boast" and "selfe", so its meaning should be read from those terms before moving to application.
The next verse adds "Let another man prayse thee and not...", so "boast" and "selfe" should be read forward into that movement. In Proverbs context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "boast" and "selfe" with trust shaped by these words, not by a vague optimism outside the passage.