Being wise means to fear God, being alert to the situation and time in which one lives, and knowing what to do and what not to do. A wise person living in the time of Psalm 90 would know that the only thing to do is to humble oneself before God. Israel lacked this wisdom.
12 Enseigne-nous à bien compter nos jours,Afin que nous appliquions notre cœur à la sagesse.