וְעַתָּ֞ה יְר֧אוּ אֶת־יְהוָ֛ה וְעִבְד֥וּ אֹת֖וֹ בְּתָמִ֣ים וּבֶֽאֱמֶ֑ת וְהָסִ֣ירוּ אֶת־אֱלֹהִ֗ים אֲשֶׁר֩ עָבְד֨וּ אֲבוֹתֵיכֶ֜ם בְּעֵ֤בֶר הַנָּהָר֙ וּבְמִצְרַ֔יִם וְעִבְד֖וּ אֶת־יְהוָֽה׃
Now therefore fear the LORD, and serve Him in sincerity and in truth; and put away the gods which your fathers served beyond the River, and in Egypt; and serve ye the LORD.
Read kabbalistic (mystical) interpretation of Joshua 24:14: and classical mystical sources.