'Thoughtless' in the Bible

Five of them were foolish [thoughtless, silly, and careless], and five were wise [far-sighted, practical, and sensible].

O you foolish and thoughtless and superficial Galatians, who has bewitched you [that you would act like this], to whom—right before your very eyes—Jesus Christ was publicly portrayed as crucified [in the gospel message]?

Therefore do not be foolish and thoughtless, but understand and firmly grasp what the will of the Lord is.

For we too once were foolish, disobedient, deceived, enslaved to various sinful desires and pleasures, spending and wasting our life in malice and envy, hateful, hating one another.