Shared ground
Luke 16:16–18 presents both a turning point and a strong continuity claim. Jesus says “the law and the prophets” belong to the period up to John, and that since then the kingdom of God is being preached publicly. The announcement produces an intense response: people are described as pressing forcefully toward it.
At the same time, Jesus rejects the idea that this new kingdom moment makes God’s instruction disposable. He states that the collapse of heaven and earth would be easier than the failure of even the smallest part of the law. He then places divorce-and-remarriage under that same moral seriousness by calling it adultery.
Where interpretation differs
1) What “until John” means for continuity. Some read Jesus as marking a major shift in how Scripture functions: John closes one era and the kingdom proclamation starts another. Others think the point is mainly about timing (a new public phase begins) while the authority and relevance of Scripture continues without downgrade.
2) What “everyone is forcing his way into it” describes. Some take it as eager pursuit—people urgently trying to enter the kingdom. Others think it includes a note of conflict—people pushing in, possibly with mixed motives or even opposition, because the message is disruptive and draws crowds.
3) How v.18 connects to v.17. Many read the divorce saying as an example of Jesus’ claim that the law does not “fall.” Others see it less as an example and more as a sharp corrective to selective Bible use: people may claim loyalty to Scripture while finding ways around hard commands.
Why the disagreement exists
The key phrases in v.16 are compressed and can be read more than one way, especially “until John” and “pressing forcefully.” Also, v.17 makes a sweeping statement about the law’s durability, but it does not spell out exactly how that durability works alongside kingdom preaching. Because v.18 is a brief, absolute-sounding statement, interpreters debate whether it is a representative case (showing the law’s continuing moral weight) or a targeted critique in the immediate argument.
What this passage clearly contributes
Explicitly, Jesus (1) places John as a boundary marker in redemptive history (“law and prophets…until John”), (2) describes the kingdom of God as publicly proclaimed from that point, (3) portrays a strong public reaction (“everyone” pressing), (4) insists that God’s law is extraordinarily durable—down to the smallest detail—and (5) names divorce followed by remarriage as adultery.
Theologically inferred from those claims: Luke portrays Jesus as announcing the kingdom without treating God’s instruction as obsolete, and as willing to apply that instruction to socially sensitive, everyday realities rather than leaving it as theory.