The Greek word Peter uses literally means "self-pleasing." It denotes the person who, dominated by self-interest and inconsiderate of others, arrogantly asserts his own will. The self-willed person so overvalues any decision he makes that he cannot be dissuaded.
Martin G. Collins
Overcoming (Part 4): Self-Will
Of all people, we who have left the Worldwide Church of God (WCG) in the past decade should be most aware of the antinomian spirit working in the church of God. The doctrinal changes that began to be instituted mere months after the death of Herbert W. Armstrong had as their goal the removal of God's law, particularly the Sabbath, from the church's beliefs. WCG's subsequent heavy emphasis on "grace" and "love," along with its renunciation of "legalism" exposed its antinomian position. Because of these changes, it has joined evangelical Protestant "Christianity" to the point that it now worships on Sunday, encourages celebration of Christmas and Easter, and permits the use of crucifixes and images of "Jesus" by its ministry and membership and in its publications.
The "Christian" churches of this world are predominantly antinomian to some extent. Both Roman Catholicism and Protestantism belong to what can be termed Hellenistic Christianity, that is, a form of Christianity heavily influenced by Greek philosophies, particularly Gnosticism. Catholicism is the more moderate of the two, having retained obedience to the Church and its traditions as well as requiring certain works for salvation. However, its belief of the afterlife, with its levels of heaven, limbo, purgatory, and beatific vision - not to mention its belief in an immortal soul - brand it as Gnostic.
Protestantism is more antinomian, having rejected Catholicism's works during the Reformation. Martin Luther's doctrine of salvation by grace "through faith alone" removes God's law from the equation altogether. Pure Protestant theology is so antinomian that it claims that lawkeeping in any form - which it terms "legalism" - is detrimental to the soul's growth in spirituality. This form of Christianity also champions the doctrine of eternal security, the idea that, once one accepts Jesus, he can never lose his salvation, no matter what sins he commits ("once saved, always saved"). This doctrine knocks out law and judgment for sin in one blow.
Of course, the world itself is antinomian because it is under the sway of Satan the Devil, who despises God's law (Ephesians 2:2; I John 5:19; Romans 8:7). He even tried his antinomian tricks on Jesus, who countered with quotations from the law (Matthew 4:1-10)! Certainly, our adversary will tempt us similarly, trying to get us to put God's law aside so we can fulfill our desires.
Jesus, however, in his prayer in John 17, asks God to help us in this, and He also gives us the antidote to antinomianism:
I do not pray that You should take them out of the world, but that You should keep [guard, protect] them from the evil one. They are not of the world, just as I am not of the world. Sanctify them by Your truth. Your word is truth. (verses 15-17)
Knowing God's truth and practicing it to become holy will protect us from the rampant antinomianism of this world, this age that is soon to end. Still to come are the Beast and his False Prophet, who will exemplify this anti-God, anti-Christ, anti-law spirit. To endure to the end, to survive the mystery of lawlessness that will mark the end time, we must hold fast to God's Word and seek His righteousness. "Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the [New Jerusalem]" (Revelation 22:14).
Richard T. Ritenbaugh
False prophets "walk according to the flesh"; their minds are primarily on physical things rather than the true things of God. God is not in all their thoughts (Psalm 10:4). They also despise authority—other than their own—and apparently think themselves superior even to God's angels. They are presumptuous and self-willed, acting out of the dictates of their own hearts (or the influence of a demon) rather than following God with humility and trusting Him to bring His will to pass.
David C. Grabbe
What Is a False Prophet?