לְ֠מַעַן דַּ֜עַת כָּל־עַמֵּ֤י הָאָ֙רֶץ֙ אֶת־יַ֣ד יְהוָ֔ה כִּ֥י חֲזָקָ֖ה הִ֑יא לְמַ֧עַן יְרָאתֶ֛ם אֶת־יְהוָ֥ה אֱלֹהֵיכֶ֖ם כָּל־הַיָּמִֽים׃ (ס)
that all the peoples of the earth may know the hand of the LORD, that it is mighty; that ye may fear the LORD your God for ever.’
Read kabbalistic (mystical) interpretation of Joshua 4:24: and classical mystical sources.