Hey, Jude.

I have always found it worth taking note of how the one lone chapter in the Book of Jude was placed as the last book of the Bible before the Revelation that was given to John. Jude could have placed great emphasis on the most wonderful things about our salvation in Jesus but instead he thought it was best to leave the Body of Christ with a warning. Jude narrowed it down to the three things to be on guard of in our own heart that will seek to destroy our faith or harden our heart if not dealt with.
The way of Cain is in complete opposition to the Way of Jesus Christ. Cain killed his brother and offered the earth the blood it required to keep us in bondage. Instead of improving his own life by heeding the correction from God, Cain killed his brother Abel who offered a better sacrifice to God. You could say Cain chose to offer the earth a sacrifice instead of God. the Rightful Owner of everything. This is the same choice Judas Iscariot made when he chose to kill himself instead of seeking reconciliation and forgiveness from Christ. Yet, Jesus saves His brother and sister and delivers us from our sin through the perfect offering of Himself to make us free. His sacrifice and resurrection have overridden the earth’s requirement for our sin. Get rid of the slave woman that will never be satisfied. Receive the Free Man that fully satisfies. (Genesis 4)
Balaam’s error was using the Truth of eternal things to cover the lies in his heart that loved to profit from temporary things (specifically, financial gain). There’s a name for that and it’s called divination. Balaam, a prophet who could not lie, taught the enemy how to use division and enticement to get God’s people to destroy each other for profit (sound familiar?). Jesus is the Truth with good plans to prosper our souls, build us up, and unite us.  (Numbers 22, 23, 24)
Korah’s rebellion is proof that jealousy can stir up the people to revolt against what God ordained. Korah stirred up the other Israelites to rebel against Aaron and Miriam who God had ordained in priestly roles as a priest and prophetess. In Korah’s jealousy, he ignored God's ordination and decided that everyone was a priest and prophet. This led to getting his followers swallowed up by the earth in a great earthquake. 
I love how Jesus came in and took care of all the damage Korah caused by allowing us to exchange our sin’s defilement for His Righteousness. Because we have such a perfect High Priest who fulfills all priestly roles, we each are now part of a royal priesthood and a holy nation. Each of us can now stand in the gap and speak God’s Word. There isn’t any reason for jealousy among us because we each have access to Jesus through our own personal relationship with Him. No one stands between us and Jesus. We individually have the King’s ear and have not come to a mountain of fear but to the mountain of Joy in Jesus, our High Priest (Hebrew 12). There is no need to seek man for what Jesus freely has given to each of us who believe. We will not find for ourselves a better advocate, defender, teacher, or intercessor than Jesus. (Numbers 16, 26)
I grew up on a lake. One of the scariest things I can remember is jumping into the lake on a busy day when the waves had no rhyme or predictable path. It was easy to get disoriented under water when the current was pushing from all directions. Sometimes, I didn’t know which way was up and would accidentally swim to the bottom instead of the top. In those times, I would calm myself down and remember my training to get back to the surface. I’m not a teacher but I do want to offer encouragement to each of us to persevere in the time we are in so that we may gain the Crown of Righteousness and finish the race. There is no need to panic if you’re feeling disoriented with the wild waves, read Jude (or listen to me read Jude in the video above). We can fortify our faith by guarding our own hearts from allowing greed, lies and unforgiveness, and jealousy to take root. The encouraging instruction we can gain from Jude involves keeping our eyes on storing our treasures up in Heaven, the Truth, and the Head who unites us. What a Gift God has given us in His Son and the Holy Spirit!
Jesus, we come before You and thank You for being our High Priest. We thank You for Your atonement. I pray Your Body will be encouraged to persevere in the Truth as declared by Your Word and Holy Spirit. Forgive us for any way we have taken that is not Your Way. Thank You for Your grace and mercy that keeps us from drowning. I pray Your people will be united by looking to You while allowing others the same liberty to pursue Your voice and direction for their own lives.  Help us to protect our hearts from the things Jude warned us about. May our love burn hot as we offer ourselves as a living sacrifice to You. In Jesus Name, Amen.