July 12

Arise ye, under all conditions, to render service to the Cause, for God will assuredly assist you through the power of His sovereignty which overshadoweth the worlds. Cleave ye unto the cord of refinement with such tenacity as to allow no trace of dirt to be seen upon your garments. Such is the injunction of One Who is sanctified above all refinement. Whoso falleth short of this standard with good reason shall incur no blame. God, verily, is the Forgiving, the Merciful. Wash ye every soiled thing with water that hath undergone no alteration in any one of the three respects; take heed not to use water that hath been altered through exposure to the air or to some other agent. Be ye the very essence of cleanliness amongst mankind. This, truly, is what your Lord, the Incomparable, the All-Wise, desireth for you. 
(Baha’u’llah, ‘The Kitab-i-Aqdas’)