Behold, I set before you this day a blessing and a curse
Meaning the law of God, and the statutes, judgments, and commandments of it; which, if obeyed, blessings would be bestowed upon them; but if disobeyed, they would be liable to the curses of it, as the following words explain it; see ( Deuteronomy 30:15-19 ) everyone of the Israelites were called upon to see and consider this matter, it being an interesting one to them all.
The Brenton translation of the Septuagint is in the public domain.