Or HaChaim on Deuteronomy 30:20/אור החיים על דברים ל׳:כ׳

1 לאהבה את ה׳ אלוקיך, "to love the Lord your G'd, etc." This passage is a continuation of the thoughts in verse 19 "in order that you may live, you and your offspring." The purpose of this desire for life on this earth must be to learn to love G'd and to obey His commandments. When Moses concludes: "for He is your life, etc." Moses merely reflects that there cannot be a meaningful purpose in life on earth other than to cleave to G'd to the best of our abilities. This makes our life in this world a fitting prelude to our life in the celestial spheres., i.e. ארך ימים.

2לשבת על האדמה, "to dwell in the land, etc." We have to read this as if the word לשבת had been prefaced with the conjunctive letter ו. Dwelling in the Holy Land is part of the attainment of completeness through performance of all parts of Torah observance. Our sages have so extolled the virtue of dwelling in the Holy Land that they said that anyone who walks in it a distance of four cubits qualifies for a share in the hereafter (Ketuvot 111).