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Knowest thou not the beauty of thine own face? Quit this temper that leads thee to war with thyself.

Jalāl ad-Dīn Muhammad Rūmī, Rumi (2015). “Collected Poetical Works of Rumi (Delphi Classics)”, p.514, Delphi Classics
Knowest thou not the beauty of thine own face? Quit this temper that leads thee to war with thyself.