Read Deuteronomy 6:1-9
6:1 Now this is the commandment--the statutes and the ordinances--that the LORD your God charged me to teach you to observe in the land that you are about to cross into and occupy,
6:2 so that you and your children and your children's children, may fear the LORD your God all the days of your life, and keep all his decrees and his commandments that I am commanding you, so that your days may be long.
6:3 Hear therefore, O Israel, and observe them diligently, so that it may go well with you, and so that you may multiply greatly in a land flowing with milk and honey, as the LORD, the God of your ancestors, has promised you.
6:4 Hear, O Israel: The LORD is our God, the LORD alone.
6:5 You shall love the LORD your God with all your heart, and with all your soul, and with all your might.
6:6 Keep these words that I am commanding you today in your heart.
6:7 Recite them to your children and talk about them when you are at home and when you are away, when you lie down and when you rise.
6:8 Bind them as a sign on your hand, fix them as an emblem on your forehead,
6:9 and write them on the doorposts of your house and on your gates.
When Jesus is asked what the most important commandment is his answer is a combination of Deuteronomy 6:5 and the second part of Leviticus 19:18 - "love your neighbour as yourself." These two commandments observed should lead to a happy life in the promised land.
Lord you give your law to give me peace. Teach me to live in your law of love as I love you with all my heart, soul and might and learn to love me neighbours as I love myself.