Bahá’í Sacred Writings, ‘Abdu’l-Bahá, #435

But when the heavenly outpourings descend and the radiant effulgences appear, the hearts are resuscitated, are liberated from the darkness of nature and the flowers of divine mysteries grow and become luxuriant. Consequently man must become the cause of the illumination of the world of humanity and propagate the holy teachings revealed in the sacred books through the divine inspiration. It is stated in the blessed Gospel: Travel ye toward the East and toward the West and enlighten the people with the light of the Most Great Guidance, so that they may take a portion and share of eternal life. Praise be to God, that the Northeastern States are in the utmost capacity. Because the ground is rich, the rain of the divine outpouring is descending. Now you must become heavenly farmers and scatter pure seeds in the prepared soil. The harvest of every other seed is limited, but the bounty and the blessing of the seed of the divine teachings is unlimited. Throughout the coming centuries and cycles many harvests will be gathered. Consider the work of former generations. During the lifetime of Jesus Christ the believing, firm souls were few and numbered, but the heavenly blessings descended so plentifully that in a number of years countless souls entered beneath the shadow of the Gospel. God has said in the Qur’án: “One grain will bring forth seven sheaves, and every sheaf shall contain one hundred grains.” In other words, one grain will become seven hundred; and if God so wills He will double these also. It has often happened that one blessed soul has become the cause of the guidance of a nation. Now we must not consider our ability and capacity, nay, rather, we must fix our gaze upon the favours and bounties of God, in these days, Who has made of the drop a sea, and of the atom a sun.