Verse 15 emphasizes ungodliness. These false ministers are the total opposite of what God is, and if we know what God is—what godliness is—then we can identify and avoid them.
Jude then gives four more descriptors to help us identify false teachers: 1) They are discontented murmurers and complainers. They always have something to gripe about. Discontent with their lot in life, they find fault with everything. Nothing is ever right for them. 2) They live to satisfy their every desire, a trait Jude has already explained thoroughly. 3) They speak bombastic bragging words, and 4) they are respecters of persons, if it will benefit them. They will do anything to get ahead.
In verse 17, we were warned that such people will enter the church and try to ruin it, so we have no excuse. They are here already, and we need to make sure they do not stay here by keeping an eye out for them and giving no quarter to them when they begin their ungodly work.
Jude then gives three final descriptions of them in verse 19. He calls them 1) "sensual" or worldly. They are based totally in this world, in the realm of the five senses. They have no connection to the heavenly. 2) They "cause divisions," meaning when they appear, the congregation begins taking sides. 3) He ends his description with the opposite of his description of true church members in verse 1: False teachers do not have God's Spirit. They are not of us. They may be among us, but they are not God's spiritual children (Romans 8:9-17). We can see from their fruits that the spirit they have is not God's.
With these descriptions of false teachers, we can be more confident in testing the spirits (I John 3:24-4:6).
Richard T. Ritenbaugh
Overall, how do we, as Christians, perceive time? Every day we are witnesses to its progression. Daylight comes and passes, and night arrives only to be followed by daylight again. We can look at a clock and see that its hands are moving. But how - in what manner - is time moving?
As a culture, the Greeks have become known as a people sensitive to the rhythms of time, and this, though written by Solomon, a Hebrew, is a decidedly Greek view of life and of time's movement. This perception of life and time - their acute awareness of things like the perpetual ebb and flow of tides, the continuous cycle of the four seasons, and the constant repetition of weather patterns - became a major building block of Greek philosophy, leading them to develop the concept that time is cyclical.
They concluded that man's life is lived within a series of continuous, changeless recurrences. To them, time works like a wheel turning on an axis, and the events that mark time's progress repeat themselves endlessly. They believed that nothing could be done about it because such events will happen eternally. Thus, a person is born, lives his life on a stage, and when his part is done, he exits. Such belief inexorably leads to a fatalistic view of life.
Notice verse 8 especially. The Soncino Commentary opines that Solomon is saying that this inescapable repetition in life is such weariness that he lacked the words to describe it aptly. Despite what Solomon writes in Ecclesiastes 1, the general Hebrew outlook is decidedly different. The Hebrew concept of time greatly benefited from God's revelation. In Jude 14-15, the apostle quotes an Old Testament personality, Enoch, whose pre-flood prophecy deflected Hebrew thought about time in a far different direction:
Now Enoch, the seventh from Adam, prophesied about these men also, saying, "Behold, the Lord comes with ten thousands of His saints, to execute judgment on all, to convict all who are ungodly among them of all their ungodly deeds which they have committed in an ungodly way, and of all the harsh things which ungodly sinners have spoken against Him." (Jude 14-15)
This quotation shows that the Hebrews who believed God knew that time was headed on a very different path from the Greek view. Events do not just happen in a vacuum; they are moving in a definite direction. Enoch is warning that a time is coming when men will have to answer for what they have done during their lifetimes.
Even so, he is nowhere near the earliest indicator that time and the events within it are moving in a specific direction. Notice Genesis 3:14-15:
So the LORD God said to the serpent; "Because you have done this, you are cursed more than all cattle, and more than every beast of the field; on your belly you shall go, and you shall eat dust all the days of your life. And I will put enmity between you and the woman, and between your seed and her Seed; He shall bruise your head, and you shall bruise His heel."
God had revealed Himself to the Hebrew descendants of Abraham, and some among them, like Moses, believed what He said. Thus, they knew that time was not cyclical, as the Greeks perceived it, but linear: The Creator is moving time and all that happens within it in a definite direction.
The prophet Amos receives credit for giving that "sometime" a general title, or at least the term is first used within his prophecy. He called it the "Day of the Lord." Generally, he appears to mean the time when God will intervene with a strong hand in the affairs of this world - an act that is definitely not repetitious.
However, it remained for the Christian church to define time and its right usage for its members. The church's conception of time blends the cyclical concepts of the Greeks and the linear concepts of the Hebrews. It is true that many things in life - things like wars, economic depressions, and political revolutions - do recur in an inexorable manner. Yet, as the New Testament shows, much of this happens as a result of man's self-centered nature. In other words, they do not have to happen, but they do happen because man's choices make them happen. Man continually makes bad choices because his nature is unchangingly anti-God.
Thus, in general, the Christian view is that time indeed contains stressful, repeating cycles, as Solomon describes, yet the New Testament calls these cycles "evil" (Galatians 1:4). However, it also shows that time is moving in a definite direction and that God Himself is orchestrating many of the events within its progress toward the return of Jesus Christ, the Day of the Lord, and the establishment on earth of His Family Kingdom.
This led the church to develop, under the inspiration of Jesus Christ, an overall concept of time management unique to church members. It has its roots in the Old Testament: Isaiah 55:6 urges us to "seek the LORD while He may be found."
John W. Ritenbaugh
Seeking God (Part Two): A Foundation
Other Forerunner Commentary entries containing Jude 1:15:
2 Kings 4:27-31