ט֛וֹב יֶ֥לֶד מִסְכֵּ֖ן וְחָכָ֑ם מִמֶּ֤לֶךְ זָקֵן֙ וּכְסִ֔יל אֲשֶׁ֛ר לֹא־יָדַ֥ע לְהִזָּהֵ֖ר עֽוֹד׃
Better is a poor and wise child than an old and foolish king, who knoweth not how to receive admonition any more.
Zohar
For we have learned that it says, "Better is a poor and wise child than an old and foolish king who knows not how to take care of himself" (Kohelet 4:13). "Better is a child," because a child represents the Good Inclination; it has been with man for only a short time. Since the age of thirteen years and onward, as we have already learned.