חָכָ֣ם יָ֭רֵא וְסָ֣ר מֵרָ֑ע וּ֝כְסִ֗יל מִתְעַבֵּ֥ר וּבוֹטֵֽחַ׃
A wise man feareth, and departeth from evil; But the fool behaveth overbearingly, and is confident.
Rashi on Proverbs
but a fool passes vigorously He strengthens himself to pass vigorously.