עִ֣יר פְּ֭רוּצָה אֵ֣ין חוֹמָ֑ה אִ֝֗ישׁ אֲשֶׁ֤ר אֵ֖ין מַעְצָ֣ר לְרוּחֽוֹ׃
Like a city broken down and without a wall, So is he whose spirit is without restraint.
Read kabbalistic (mystical) interpretation of Proverbs 25:28: and classical mystical sources.