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 Abha 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 Baha!
The disciples of Christ forgot themselves and all earthly things, forsook all their cares and belongings, purged themselves of self and passion, and with absolute detachment scattered far and wide and engaged in calling the peoples of the world to the divine guidance; till at last they made the world another world, illumined the surface of the earth, and even to their last hour proved self-sacrificing in the pathway of that beloved One of God. Finally in various lands they suffered glorious martyrdom. Let them that are men of action follow in their footsteps!
(The Sacred Will and Testament of `Abdu'l-Baha, Page 10)