Verses 4-9:
Verse 4: These are the words which faithful Jews begin their daily liturgy, morning and evening. So ingrained is this in their life that history records during the historic persecution of the Jews in Spain, their involuntary utterance of the phrase often betrayed them to their enemies.
It is an expression of the essential unity of Jehovah Elohim. It is not, "Jehovah is alone God;" but "Jehovah our Elohim is one Jehovah." Though He is plural, Elohim, He is One. He is the Absolute, Infinite, Ever-present One, who alone is to be worshipped.
Jesus quoted verse 5 in response to a question regarding the Law, Matthew 22:35-40; Mr 12:28-33; Luke 10:27.
"Love" (verse 5) is not an emotion of liking or affection. It is an act of the will, a choice to give the highest regard for the top priority to its object, in this case God. It involves the three-fold being of man:
(1) "With all thy heart," the innermost being, the spirit.
(2) "With all thy soul," the mind, will, and emotions.
(3) "With all thy might," the physical part of one’s being.
The text affirms a basic principle, which applies today as well as in Moses’ time. It is the responsibility of parents for the education of their children. Nowhere in Scripture, or in history prior to the Eighteenth Century, is there a command or precedent for the state to claim responsibility for the education of children.
This does not mean that parents should be required or expected to educate their children in the complexities of all the arts and sciences. Parents - fathers in particular - are to begin in the home, during the infancy and early childhood years, instilling in the children Godly character. This is accomplished by teaching God’s Word, His commandments and judgments and statutes and righteous principles, see 2 Timothy 3:15-17; 2 Timothy 1:5; Genesis 18:19. Godly character - wisdom - is the foundation upon which all knowledge is to be built, Psalms 111:10; Proverbs 1:7. When this foundation is firmly laid, then the parents are responsible to entrust the further education of their children to others who are skilled in the arts and sciences, Galatians 4:1-2.
The text explains how parents (fathers) may fulfill their responsibility to educate their children:
(1) God’s Word must first be in the parents’ heart.
(2) "Teach ...diligently," shanan, "to sharpen, repeat," also translated "what," Deuteronomy 32:41; Psalms 64:3; and "pricked," Psalms 73:21. The meaning: to what the appetite and sharpen skills by patient, persistent teaching.
(3) "Talk of them," in the house, during time of leisure and refreshment, such as meal-time.
(4) "Walkest by the way," going about one’s duties in the business world.
(5) "Liest down," the final activity at night just before retiring.
(6) "Risest up," the activity to begin the day.
Biblical parenting is a heavy responsibility!
Verse 8: the basis for the custom of wearing phylacteries, to which Jesus referred, Matthew 23:5. This custom originated about the Second Century BC. It required all male Jews to wear at morning prayers and on festivals, two phylacteries. These were small leather cases, bound by strips of leather (or ribbon) to the forehead and the left arm. The box on the head was called a "frontlet," tokaphoth, Exodus 13:16; Deuteronomy 6:18; Deuteronomy 11:18. It contained strips of parchment upon which were written the words of Exodus 13:2-20; Exodus 13:11-17; Deuteronomy 6:4-10; Deuteronomy 6:13-22.
The totaphoth, attached to the forehead, symbolized the guidance of the instrument of direction in walking. God’s Word is to guide one’s daily walk The one attached to the hand symbolized the direction of the instrument of acting. God’s Word is to guide one’s daily activities.
Another custom based on this verse: writing the words of Deuteronomy 6:4-9 and Deuteronomy 11:13-21 on strips of parchment, enclosing these in a cylinder which was attached to the right-hand door post, mezuzah, of every room in the house. This teaches that God’s Word is to be constantly before His child, so he will unerringly observe and practice it.