From sophron; to be of sound mind, i.e. Sane, (figuratively) moderate -- be in right mind, be sober (minded), soberly.
see GREEK sophron
a. to be in one's right mind: of one who has ceased δαιμονίζεσθαι, Mark 5:15; Luke 8:35; opposed to ἐκστηναι, 2 Corinthians 5:13, (the σωφρονων and μανεις are contrasted in Plato, de rep. i., p. 331 c.; σωφρονουσαι and μανεισαι, Phaedr., p. 244 b.; ὁ μεμηνως ... ἐσωφρονησε, Apollod. 3, 5, 1, 6).
b. to exercise self-control; i. e. α. to put a moderate estimate upon oneself, think of oneself soberly: opposed to ὑπερφρονεῖν, Romans 12:3. β. to curb one's passions, Titus 2:6; joined with νήφω (as in Lucian, Nigrin. 6) (R. V. be of sound mind and be sober), 1 Peter 4:7.