'Self restrained' in the Bible

The minister should be a man of blameless character; he should be husband of but one wife; he should live a sober, self-restrained, orderly life; he should be hospitable, skilled in teaching;

In a similar way urge the young men to be sensible and self-controlled and to behave wisely [taking life seriously].

The end and culmination of all things is near. Therefore, be sound-minded and self-controlled for the purpose of prayer [staying balanced and focused on the things of God so that your communication will be clear, reasonable, specific and pleasing to Him.]