Sophroneo describes exercising sober, self-controlled judgment or being found in a settled state of mind.

The attested uses chiefly describe sober, self-controlled judgment in exhortation and contrast with being beside oneself; in the two narrative participles, the term describes a man sitting clothed after the demons had gone out. The verses therefore show both conduct marked by controlled judgment and a settled state of mind.

1. Exercising sober, self-controlled judgment · dominant

   In Romans 12:3, the present active infinitive occurs in the contrast between thinking too highly and thinking with sober judgment. In Titus 2:6, the same infinitive follows an instruction concerning younger men, while 1 Peter 4:7 uses an aorist active plural form in an exhortation connected with prayer; the APB renders these clauses with “sober judgment” and “self-controlled.” In 2 Corinthians 5:13, the present active indicative plural form is set against being “beside ourselves,” and the APB renders the contrasting clause “of sound mind.”

   Romans 12:3Titus 2:61 Peter 4:72 Corinthians 5:13
2. Being found in a settled state of mind · common

   In Mark 5:15, a present active masculine accusative singular participle describes the man who had had the legion as sitting clothed after others came to Jesus; the APB renders the scene “in his right mind.” Luke 8:35 uses the same participial form when people find the man from whom the demons had gone out sitting, clothed, beside Jesus’ feet; the APB renders him “of sound mind.”

   Mark 5:15Luke 8:35

In the Anselm Project Bible: Across the occurrences, the APB uses “sober judgment,” “self-controlled,” “of sound mind,” and “in his right mind.” These renderings present the surrounding clauses rather than providing a one-to-one translation.