Titus 1:15

There is a standard required of elders and overseers. They are to sharply rebuke those who contradict the truth. Paul continues to talk about those who contradict the truth. One interesting thing he mentions is that for those who are pure, all things are pure. In contrast, nothing is pure to the defiled and unbelieving. I guess this makes sense because if all things were not pure to those who are pure, then they would no longer be pure. Like, if someone or something was pure, then for them to associate or have something that was impure would cause themselves to be impure. Purity demands purity and to cease in purity would result in being impure. If impure things cause things to be impure, then it makes sense for all things to be impure to those who are impure. Another way to say this is defiled, which is the word that the ESV uses. If someone were to call themselves defiled, they can't associate or say that some of their lives are pure. The pure ceases to be pure in the presence of the defiled, so all things are defiled to the defiled.

Another interesting thing is that the unbelieving is associated with the defiled. Those who are unbelieving are those who are impure and defiled. All these things mentioned about the defiled seems to apply to the unbelieving. All things are defiled to those who are unbelieving. Some people who do not believe in the Lord Jesus Christ may claim to be pure or have some or some form of purity in them, but Paul is saying that to them, nothing is pure.

For the defiled and unbelieving, both their minds and their consciences are defiled. Having your mind defiled causes you to act and do things that are not pure. Moreover, having a defiled conscience keeps you from acknowledging your actions as wrong. Therefore, you'd probably continue doing that which is impure and not even stop to consider what is right or wrong.