For, als (since)--and this was by the chochmah of Hashem--the Olam Hazeh did not by its chochmah have da'as of Hashem, G-d was pleased through the "sichlut" (foolishness) of the Hachrazah (Proclamation, Kerygma, Preaching) of the Besuras HaGeulah to save the ma'aminim (believers).