'Seriously' in the Bible

Therefore be continually alert, remembering that for three years, night or day, I did not stop admonishing and advising each one [of you] with tears.

We [earnestly] urge you, believers, admonish those who are out of line [the undisciplined, the unruly, the disorderly], encourage the timid [who lack spiritual courage], help the [spiritually] weak, be very patient with everyone [always controlling your temper].

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