September 12

He [Mírzá Muhammad-Qulí, a loyal brother of Baha’u’llah] kept always to his own way of being. He traveled in the company of Bahá’u’lláh; from ‘Iráq to Constantinople he was with the convoy and at the halting-places it was his task to pitch the tents. He served with the greatest diligence, and did not know the meaning of lethargy or fatigue. In Constantinople as well, and later in the Land of Mystery, Adrianople, he continued on, in one and the same invariable condition.

With his peerless Lord, he then was exiled to the Akká fortress, condemned by order of the Sultán to be imprisoned forever. But he accepted in the same spirit all that came his way—comfort and torment, hardship and respite, sickness and health; eloquently, he would return thanks to the Blessed Beauty for His bounties, uttering praise with a free heart and a face that shone like the sun. Each morning and evening he waited upon Bahá’u’lláh, delighting in and sustained by His presence; and mostly, he kept silent. 
- ‘Abdu’l-Baha  (From a talk; ‘Memorials of the Faithful’)