Shared ground
Titus 1:15–16 closes a warning about teachers whose influence harms households and communities (1:10–14). The passage draws a sharp contrast between “the pure” and “the defiled and unbelieving.” It claims that purity or defilement is not mainly about external objects but about the inner person: “mind” and “conscience” shape how everything is approached.
The text also insists that a spoken claim (“they profess that they know God”) can be exposed as empty when actions consistently point the other way. In this passage, the verdict is not mild inconsistency but a settled pattern: their works amount to denial, and the result is being “unfit for any good work” (work).
Where interpretation differs (only where needed)
What “all things” refers to. Some read “all things are pure” mainly in the arena of food laws and ritual scruples (what one may eat, touch, or practice). Others read it more broadly as everyday matters in general, including how one handles ordinary life and community relationships.
What “pure” means here. Some take “pure” mostly as “ritually clean” language being re-framed around inner life. Others take it primarily as moral integrity—an inner wholeness that leads to clean handling of “all things.”
Why the disagreement exists
The language of purity/defilement naturally overlaps with older debates about food and ritual boundaries, but this letter also stresses character and behavior as the proof of credible teaching (1:5–9). Because both themes fit the words, interpreters weigh the immediate context (false teachers, households, dishonest gain) differently when deciding how narrowly to read “all things.”
What this passage clearly contributes
Explicitly, the passage teaches that inner corruption (“mind” and “conscience” defiled) has a totalizing effect: for the defiled, “nothing is pure.” It also teaches that claiming to “know God” (know) can coexist with a life that functionally denies him—and that such a pattern warrants a strong negative assessment (“abominable, disobedient”) and the conclusion of being unreliable for genuinely good action (good). Theologically inferred from this is a tight link between confession and conduct: public profession is evaluated by observable works, especially in community life.
