From His Tongue — Muḥammad al-ʿArabī al-Darqāwīمِنْ كَلَامِهِ

... always flee from sensuality, for it is the opposite of spirituality and opposites do not mix.

Letters of a Sufi Master by Muhammad al-Arābi al-Darqāwi ق. Translated by Titus Ibrahîm Burckhardt.