According to Bhai Mani Singh, Sikhan di Bhagat Mala, Guru Arjan pleased with his devotion, once said, “Dipa is a dipak, i.e. a lamp. As one lamp flame lights another, so would Bhai Dipa, having received true knowledge, diffuse it among those who come in contact with him.” Bhai Dipa was appointed a masand, or area leader to spread the Guru`s message.
References :
�1. Mani Singh, Bhai, Sikhan di Bhagat Mala. Amritsar, 1955
2. Santokh Singh, Bhai, Sri Gur Pratap Sura] Granth. Amritsar, 1926-37