ברכה וקללה למה נאמר. לפי שנאמר החיים והמות נתתי לפניך הברכה והקללה שמא יאמרו ישראל הואיל ונתן המקום לפנינו שני דרכים דרך החיים ודרך המות נלך באיזו מהן שנרצה, תלמוד לומר ובחרת בחיים
Why does the verse need to mention blessings and the curses? As another verse (Deuteronomy 30:19) already mentions "I have put before you life and death, blessing and curse. Choose life—if you and your offspring would live" Perhaps Israel will say that since HaShem has given us two paths to choose from, the path of life and that of death, we can go in whichever one we choose.. so this verse comes to teach us that no, we should only choose life.
However, our ancestors taught us a huge matter in this regard, and there was divine prophetic inspiration in their houses of study, as they foresaw in the future there will be a day to come that the living will be jealous of the dead, and they had written the following in the Mishnah -
וְעַל כָּרְחֲךָ אַתָּה חַי, וְעַל כָּרְחֲךָ אַתָּה מֵת
..against your will you live, against your will you will die..
As we see below from King David -
(18) The LORD punished me severely,
but did not hand me over to death.
As the holy Rabbi Yechiel Michel of Zlatshov, may he be remembered for eternal life, has taught based on the below verse from Pslams -
(8) I am ever mindful of the LORD’s presence; He is at my right hand; I shall never be shaken.
And these words are known from the elder, the Holy Rabbi, Rebbe Uri the firebrand of Stralisk, who explains the famous liturgy -
אַ סִתְרוֹ יוֹשֶׁר: עֲצָתוֹ אֱמוּנָה
His secret is uprightness! His counsel is faith
And in truth, whoever has a slight amount of logic and reason in their brain, can see that everything is from The Creator, and your strength is reinforced, and life is chosen, and the hope that everything will be good reigns, and that one day we will be free, and there will be a time when I will see the salvation of HaShem and have the status of a survivor.. whoever believes this, is called someone who is always living a life, and is alive at all times.. and is prepared to receive everything with simplicity, and to this person salvation is nearby, which is not the case with someone who believes in chance and happenstance, G-D forbid - as salvation is far from the wicked.
As the first of His works of old.
The first fruits of His harvest.
All who ate of it were held guilty;
Disaster befell them
—declares the LORD.

