to be of sound mind: clear-headed and sane, and so self-controlled and sensible rather than reckless or carried away.
This word ties together two ideas that English keeps in separate rooms: being sane (having a clear, sound mind) and being self-controlled (moderate, level-headed, disciplined). It nearly always carries both at once, with the balance tipping one way or the other depending on the sentence.
You can watch the range play out across its handful of uses:
- In the Gospels it is sanity restored: the man freed from the demons is found sitting "in his right mind," the opposite of the madness that had gripped him.
- In Paul it curbs pride: he tells the Roman Christians not to think too highly of themselves but to think with a sober, honest estimate of who they are.
- In the letter to Titus it names a settled trait of character, the self-control that marks a well-ordered Christian life.
- In 1 Peter it is a clear, alert mind that makes room for prayer, set right next to the call to stay νήφω ("sober" in the sense of wide awake).
The New Testament writers reached for this word on purpose. It was the flagship term of Greek moral philosophy, one of the four classic virtues, and it had no single counterpart in Hebrew, where the idea was scattered across separate words for wisdom, understanding, and discipline. When Paul plays on the ordinary verb φρονέω ("to think") in Romans, the point is that this is thinking done soundly.
It is a mistake to force the "sane" side apart from the "self-controlled" side. The word names a mind so well-ordered that it produces a well-ordered life: right thinking that shows up as right living.
Nuances
Disputed
How to read the concentration of this virtue-word in the letters to Timothy and Titus (its charge to Titus among them): whether the church is simply borrowing a respectable Greco-Roman virtue, reshaping that virtue around the gospel, or wielding it to enforce social roles, especially for women.
- majorityThe virtue is reshaped around the gospel: God's grace itself is said to train believers to live this way, so the form is Greek but the driving content is Christian.; Philip H. Towner, The Letters to Timothy and Titus (NICNT, 2006); I. Howard Marshall, The Pastoral Epistles (ICC, 1999); Abraham J. Malherbe, Light from the Gentiles: Hellenistic Philosophy and Early Christianity (NovTSup 150; Brill, 2014)
- minorityThe church is absorbing a Greco-Roman civic virtue wholesale as it settles into respectable, middle-class piety.; Martin Dibelius and Hans Conzelmann, The Pastoral Epistles (Hermeneia, 1972)
- contestedThe word works as an ideological instrument that enforces Greco-Roman honor codes and keeps women in the domestic sphere; against this, others argue it was predicated of women who owned property, held office, and spoke publicly, so it need not imply subordination.; Korinna Zamfir, Men and Women in the Household of God (NTOA/StUNT 103; V&R, 2013); Susan E. Hylen, A Modest Apostle: Thecla and the History of Women in the Early Church (Oxford, 2015)