Thou shalt love the Lord, etc. - Here we see the truth of that word of the apostle, 1 Timothy 1:5 : Now the End of the Commandment is Love out of a pure heart, etc. See the whole of the doctrine contained in this verse explained on Matthew 22:36-40 (note).

thou shalt

Deuteronomy 10:12 And now, Israel, what does the LORD your God require of you, but to fear the LORD your God, to walk in all his ways, and to love him...

Deuteronomy 11:13 And it shall come to pass, if you shall listen diligently to my commandments which I command you this day, to love the LORD your God...

Deuteronomy 30:6 And the LORD your God will circumcise your heart, and the heart of your seed, to love the LORD your God with all your heart...

Matthew 22:37 Jesus said to him, You shall love the Lord your God with all your heart, and with all your soul, and with all your mind.

Mark 12:30,33 And you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength...

Luke 10:27 And he answering said, You shall love the Lord your God with all your heart, and with all your soul, and with all your strength...

1 John 5:3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.

God with all

Deuteronomy 4:29 But if from there you shall seek the LORD your God, you shall find him, if you seek him with all your heart and with all your soul.

2 Kings 23:25 And like to him was there no king before him, that turned to the LORD with all his heart, and with all his soul, and with all his might...

Matthew 10:37 He that loves father or mother more than me is not worthy of me: and he that loves son or daughter more than me is not worthy of me.

John 14:20,21 At that day you shall know that I am in my Father, and you in me, and I in you...

2 Corinthians 5:14,15 For the love of Christ constrains us; because we thus judge, that if one died for all, then were all dead...

Love
The rule of obedience being the moral law, comprehended in the Ten Commandments, the next question is: What is the sum of the Ten Commandments? The sum of the Ten Commandments is, to love the Lord our God with all our heart, with all our soul, with all our strength, and with all our mind, and our neighbour as ourselves. Thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might.' Deut 6: 5. The duty called for is love, yea, the strength of love, with all …
Thomas Watson—The Ten Commandments

"Destroyed for Lack of Knowledge"
God's favor toward Israel had always been conditional on their obedience. At the foot of Sinai they had entered into covenant relationship with Him as His "peculiar treasure. . . above all people." Solemnly they had promised to follow in the path of obedience. "All that the Lord hath spoken we will do," they had said. Exodus 19:5, 8. And when, a few days afterward, God's law was spoken from Sinai, and additional instruction in the form of statutes and judgments was communicated through Moses, the …
Ellen Gould White—The Story of Prophets and Kings

The Wilderness: Temptation. Matthew 4:1-11. Mark 1:12, 13. Luke 4:1-13.
The University of Arabia: Jesus' naturalness--the Spirit's presence--intensity, Luke 2:45-51.--a true perspective--- the temptation's path--sin's path--John's grouping, 1 John 2:16.--the Spirit's plan--why--the devil's weakness--the Spirit's leading--a wilderness for every God-used man, Moses, Elijah, Paul. Earth's Ugliest, Deepest Scar: Jesus the only one led up to be tempted--the wilderness--its history, Genesis 13:10-13. 18:16-19:38.--Jesus really tempted--no wrong here in inner response--every …
S. D. Gordon—Quiet Talks about Jesus