19:11 neither lie one to another Ephesians 4:25 Colossians 3:9
19:17 rebuke Ephesians 5:11
19:18 Thou shalt not avenge Romans 12:17
19:18 Thou shalt love thy neighbour Romans 13:9 Galatians 5:14 James 2:8 etc:

There are other places where this is quoted but the three listed above expound its meaning to the disciple of Christ in a helpful way.
Honesty is the only basis for a true and lasting relationship Leviticus 19:11 so we 'rebuke' unrighteousness but not in a vengeful way because the law is fulfilled in those who love their enemies.

19:2      That holiness was to be manifested because that is how God is provides the most powerful reason for obedience to His law. No theory here. If we wish to be like God then we have to emulate His characteristics.

V.15 - don't show partiality to rich or poor James 2:1-4

V.16 - warnings about being a talebearer/gossip 1Tim 5:13

V.17 - can't love God if you hate your brother 1John 4:20-21

19:7    The peace offering was to be voluntary – not be constraint – because God seeks for a willing sacrifice – 2Cor 9:7

19:3 We might think fearing parents and keeping the sabbath re totally unrelated. However they are not. Keeping the sabbath indicates a ‘fear’ of God who commanded its observance.

Lev 19:2;1Pet 1:16.     Lev 19:18;Matt 5:43-44;Mark 12:28-31;Matt 19:16-19;Luke 10:25-37 ("who is my neighbor?").

John, your 18th birthday present is parked outside. I know we're spoiling you with a Porche, but nothing's too good for our son. We just want you to be happy!

John reaches for the keys.

No son. I'll hold on to these. You can look at your car but you can't drive it for another five years until your 23rd birthday. Is that ok?

In v23-25 we have just this situation. Israel had been promised a land flowing with milk and honey. And now God seemed to be taking it all away. How can we stand to watch all that fruit rot on the tree, and not eat it?

Sometimes God designs for us a time of testing. We have been promised something good but He makes us wait for it. This isn't out of spite, but to help us trust in Him. If we had everything given to us on a silver platter would we need faith? In Luke 8:15 we ourselves are likened to fruitful ground, which only bears good fruit because of one ingredient... patience.

David wants to show us that every part of his life, and by implication every part of ours, may be lived by recourse to God's word. He demonstrates it in spectacular fashion by writing 176 statements proving it! Testimonies, testament, commandments, statutes, judgments, precepts, ordinances, Gods word, and His law appear in just about every verse, yet every verse is different!

I think v89 is key to what David is getting accross. Many of the verses talk about earthly things or people passing away, whilst David trusts in, and is anchored by, the word of God. Many verses talk about choosing that word, though mocked and despised because of it (e.g. 19, 23, 39, 42, 46, 51). David is showing that he will hold onto the word, no matter what tempts him away from it, or whatever difficulty he is in (e.g. 78, 85, 95, 110, 115, 116). The reason is in v89 "Forever, O LORD, Your word is settled in heaven". God's word is everlasting, and abides in heaven (i.e. with God). If one takes in the word of God, loves it, meditates on it, does it, then he too will last forever. There is no greater reason to hold onto something than that! This is largely what the difficult teaching of Jesus is about in the gospel of John. We can be begotten (born again) by the word of God. If we are born of it, then we too will last forever, and we will be heavenly creations. If we live and breathe the word of God, then we are sons and daughters of His. God wants such to be with Him for eternity. His family. His heritage. His offspring.

119:80           Are we so anxious to read Scripture as it seems the Psalmist was?

V.33,44,97,98,99,100,101,102,110 - these verses along with others in the chapter perhaps have a messianic application.

119:92-93 Whilst it might be thought that keeping God’s word is restrictive the Psalmist explains that there is a saving relationship between keeping the word and overcoming affliction. How do we feel? Does Scripture help us deal with difficulties in life?

119:85-86  There is a powerful exhortation for us in the contrast between the wicked and God’s law. We either imitate the wicked or live a life consistent with God’s law. The wicked as self seeking – overthrowing others. God’s law is faithful – seeking the good of others.

119:103 The idea of the word of God being sweeter than honey is a point that David has made before – Psa 19:10

v.12 The phrase 'young child' as translated here only occurs in the following places Matthew 2:8,9,11,13,14,20,21 and is always used to speak of Jesus in the context of the 'wise men'. Whereas the word 'babe' is used at the time of the visit of the shepherds at Bethlehem. Luke 2:12,16 implying that by the time the 'wise men' arrived the 'babe' had grown to be a 'young child' indicating a time gap between the two events.

Simeon's Use of Scripture - Luke 2:25-35
v.26 'Lord's Christ' - Psalm 2:2 'Lord anointed'
v.30 'seen thy salvation' Genesis 49:10 'waited for thy salvation'
v.32 'light to lighten the gentiles' Isaiah 42:6 'light of the gentiles'
v.32 'glory of thy people Israel' Isaiah 45:25 'Israel be justified and shall glory'
v.34 'sign spoken against' Psalm 22:6 'a reproach of men'
v.35 'a sword shall pierce' Psalm 42:10 'with a sword in my bones'

V.8  indicates that the time of year was spring (lambing season, Feb./Mar).  That is the reason the shepherds were in the field at night, protecting their flock.  This refutes the nonsense that Dec. 25th. (The Roman pagan feast day of Saturnalia) was the birthday of Jesus.
 
It is not likely that Mary and Joseph were in Bethlehem very long before Jesus was born.  After the birth, Mary would have had to perform her days of purification according to the Law. The sequence ran:

-eight days after birth, Jesus was circumcised (v.21 cf.Lev 12:3).

-Mary had thirty-three days of purification (v,22 cf.Lev 12:4).

After the days of purification, a burnt offering had to be made at the tabernacle (Lev 12:6-8).  In the case of Mary, that meant at the temple in Jerusalem (v.22).  Note that her offering of two birds, rather than a lamb, signified her state of poverty.

And so, from the time of Jesus' birth to the time of the departure to Jerusalem was 41 days.  During that time, Jesus was visited by the shepherds (v.15,16) and the wise men (after Herod tried to recruit them for the young child's destruction) (Matt 2:1-9). Herod's attempts to kill Jesus, of course, were thwarted (Matt 2:12).

V.25-26 Simeon had been provided with a rare and special blessing. In some manner, even before Pentecost, the Holy Spirit rested upon him. That same Comforter had revealed to him that he would not die before he had seen the Lord's Christ. 

2:5-7 Doubtless Joseph and Mary felt that the taxing and the constraint it put on them to return to Bethlehem would have been seen as a problem - or did they see it as the way that the prophet Micah's words would be fulfilled?

2:8-11 The shepherds were taken from caring for the sheep in the field to see the ‘lamb of God’.

2:1  ‘all the world’ was to be taxed. At the end of the ministry of Jesus Luke records – Acts 1:8 – that the gospel went out to all the world – ‘the uttermost parts …’

2:7 Clearly Jesus was Mary’s ‘firstborn’ however we should appreciate that God’s ‘firstborn’ had been prophesied before – Psa 89:27 and the record here is highlighting that link.

V.4 It is not likely that Mary and Joseph were in Bethlehem very long before Jesus was born.  After the birth, Mary would have had to perform her days of purification according to the Law. The sequence would have run:

-eight days after birth, Jesus was circumcised (v.21 cf. Lev 12:3).

-Mary had thirty-three days of purification (v.22 cf. Lev 12:4).

After the days of purification, a burnt offering had to be made at the tabernacle (Lev 12:6-8).  In the case of Mary, that meant at the temple in Jerusalem (v.22).  Note that her offering of two birds, rather than a lamb, signified her state of poverty.

And so, from the time of Jesus' birth to the time of the departure to Jerusalem was 41 days.  During that time, Jesus was visited by the shepherds (vs.15,16) and the wise men (after Herod tried to recruit them for the young child's destruction) (Matt 2:1-9). Herod's attempts to kill Jesus, of course, were thwarted (Matt 2:12).

V.4 fulfils Mic 5:2

V.25 The consolation of Israel is a phrase that meant the redemption of Israel through its Messiah, which was long awaited by pious Jews. Simeon is derived from the Hebrew word shama which means hear.  The message about the Messiah had been heard and understood (vs.30-32).

V.32 See Isa 60:3.

V.36 Anna is a contraction of Hannah which means grace.

V.32 Yahweh's grace would be extended to the Gentiles.  True believers would become adopted Sons of Israel and, therfore subject to their promises (Rom 11:17).

2:11 ‘unto you is born’ is one of the many refrains of Isa 7:14 that are found around the birth narrative of Jesus in the gospel narratives.