Charles Spurgeon Commentary Proverbs 27:1

"Boast not thyself of tomorrow; For thou knowest not what a day may bring forth." — Proverbs 27:1 (ASV)

Let us never boast of future days and years, or what we mean to do when we reach any age, or what shall be our position when we grow gray. Let us never boast of anything in the future, for we cannot tell what even a day may bring forth.