I do commend you for your diligence in studying the word of God in search of the truth. Deut 30:19 - I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing; therefore choose life, that both thou and thy seed may live. This was Moses instructing God's people, Israel (Jacob), who God changed his name to be called Israel, Gen 32:28, whom God has blessed his offspring to be his elect people, Heb 11:12. These people that Moses was instructing were already regenerated children and not natural men who does not have the indwelling of the Holy Spirit. The life that was offered to God's children in Deut 30:19 was not eternal life, but that abundant life here on earth if we follow his commandments. If the natural man, as described in 1 Cor 2:14, could choose eternal life, it would be eternal salvation by the works of man. Because of what God saw by his foreknowledge (Ps 53:2-3) is why he choose an elect people (Eph 1:4) and had his Son to make them holy and without blame (Eph 1:4) , so that he would have someone to love him. We love him because he first loved us (1 John 4:19).