טוֹבָ֥ה חָכְמָ֖ה מִכְּלֵ֣י קְרָ֑ב וְחוֹטֶ֣א אֶחָ֔ד יְאַבֵּ֥ד טוֹבָ֥ה הַרְבֵּֽה׃
Wisdom is better than weapons of war; But one sinner destroyeth much good.
Read kabbalistic (mystical) interpretation of Ecclesiastes 9:18: and classical mystical sources.