1It shall happen, when all these things have come on you, the blessing and the curse, which I have set before you, and you shall call them to mind among all the nations where Yahweh your God has driven you, 2and return to Yahweh your God and obey his voice according to all that I command you today, you and your children, with all your heart and with all your soul, 3that then Yahweh your God will release you from captivity, have compassion on you, and will return and gather you from all the peoples where Yahweh your God has scattered you. 4If your outcasts are in the uttermost parts of the heavens, from there Yahweh your God will gather you, and from there he will bring you back. 5Yahweh your God will bring you into the land which your fathers possessed, and you will possess it. He will do you good, and increase your numbers more than your fathers. 6Yahweh your God will circumcise your heart, and the heart of your offspring, to love Yahweh your God with all your heart and with all your soul, that you may live. 7Yahweh your God will put all these curses on your enemies and on those who hate you, who persecuted you. 8You shall return and obey Yahweh’s voice, and do all his commandments which I command you today. 9Yahweh your God will make you prosperous in all the work of your hand, in the fruit of your body, in the fruit of your livestock, and in the fruit of your ground, for good; for Yahweh will again rejoice over you for good, as he rejoiced over your fathers, 10if you will obey Yahweh your God’s voice, to keep his commandments and his statutes which are written in this book of the law, if you turn to Yahweh your God with all your heart and with all your soul.
11For this commandment which I command you today is not too hard for you or too distant. 12It is not in heaven, that you should say, “Who will go up for us to heaven, bring it to us, and proclaim it to us, that we may do it?” 13Neither is it beyond the sea, that you should say, “Who will go over the sea for us, bring it to us, and proclaim it to us, that we may do it?” 14But the word is very near to you, in your mouth and in your heart, that you may do it. 15Behold, I have set before you today life and prosperity, and death and evil. 16For I command you today to love Yahweh your God, to walk in his ways and to keep his commandments, his statutes, and his ordinances, that you may live and multiply, and that Yahweh your God may bless you in the land where you go in to possess it. 17But if your heart turns away, and you will not hear, but are drawn away and worship other gods, and serve them, 18I declare to you today that you will surely perish. You will not prolong your days in the land where you pass over the Jordan to go in to possess it. 19I call heaven and earth to witness against you today that I have set before you life and death, the blessing and the curse. Therefore choose life, that you may live, you and your descendants, 20to love Yahweh your God, to obey his voice, and to cling to him; for he is your life, and the length of your days, that you may dwell in the land which Yahweh swore to your fathers, to Abraham, to Isaac, and to Jacob, to give them.
Jacob was the son of Isaac and Rebekah, born immediately after Esau, and Abraham was his grandfather. He achieved the right of the firstborn by trickery, in offering his older brother, Esau, food in exchange for the birthright, who cared little for this position. He also received the blessing of firstborn from his father Jacob before his death by cunning, and with the assistance of his mother Rebekah.
After his deception of Esau, receiving the blessing from his father, Jacob escaped to his uncle Laban, who in turn deceived Jacob into working for fourteen years for the marriage of Jacob to Leah, and then his beloved Rachel. Laban also sought to deceive Jacob of wages, but God intervened to ensure he would prosper. In a time of trial, when he feared the wrath of Esau, upon returning to the land of Canaan, Jacob had an encounter with God, and his name was changed to Israel, the one who wrestles with God. Even though his early life was characterized by deception, God worked through the situation to ensure that Jacob would be the one in the line of the patriarchs, to create a great nation and ultimately fulfill His purposes in the earth, especially through the future Messiah. The Messiah would guarantee the promise of the land to Abram and a person who would rule over Abraham's descendants, but also He would bring blessings to all the people of the earth (Gen 12:1-3).
In spite of Jacob's early failure by deception, God worked through him, and finally, Jacob became a different type of man after his struggle with God. As one has said,
"Despite Jacob’s faults, God chose him to be the leader of a great nation that still bears his name today. But for this, it is unlikely that we would know much about Jacob, who appears to be in the middle of events while the key players are those around him. There is no great wisdom or bravery in Jacob to speak of, and we are tempted to see him as little more than God’s passive instrument. If we are tempted to think that, because we aren’t in the spotlight performing great acts for God, we are unimportant to Him, then we should consider the life of Jacob and know that, in spite of our failings, God can and will still use us in His plan."
For more on Jacob, see "Who was Jacob in the Bible?", https://www.gotquestions.org/life-Jacob.html