In these days, the most important of all things is the guidance of the nations and peoples of the world. Teaching the Cause is of utmost importance for it is the head corner-stone of the foundation itself. This wronged servant has spent his days and nights in promoting the Cause and urging the peoples to service. He rested not a moment, till the fame of the Cause of God was noised abroad in the world and the celestial strains from the Abhá Kingdom roused the East and the West. The beloved of God must also follow the same example. This is the secret of faithfulness, this is the requirement of servitude to the Threshold of Bahá!
- ‘Abdu’l-Baha (‘The Will and Testament of ‘Abdu’l-Baha’)