They shall keep guard over him and over the whole congregation before the tent of meeting, as they minister at the tabernacle. Numbers 3:7 (ESV)
Throughout this chapter we read about the Levites duty to guard the tabernacle, kill offenders as well as carrying, dismantling and building it. As Christians we are a royal priesthood to God, we must defend the faith, killing all false teaching etc and minister in the body of Christ (Jude 3, Phil 1:27, 1 Peter 2:9).
For the poor you always have with you, but you do not always have me.” John 12:8 (ESV)
We should never allow ourselves to exchanges extravagant devotion and worship to Jesus with the pursuit of social justice. Instead one should not be done without the other.
But you, O LORD, are a shield about me, my glory, and the lifter of my head. Psalm 3:3 (ESV)
In the middle of hostility we can take comfort in remembering that God is our shield, protecting us from the enemy. We can also be glad that God is our treasure and great reward.
You have put more joy in my heart than they have when their grain and wine abound. Psalm 4:7 (ESV)
There is a lot of God to think over in this psalm. Verse 3 reminds us God has set us apart while verse 4 reminds us to not sin when we are angry. This verse reminds us that our true joy is to be found in God and he puts more satisfaction and joy in our hearts than anything of this world. Jesus said he wanted our joy to be full.