What is our spiritual service?

O my brethren, there is nothing for all this, but the pure and beautiful and simple truths taught by Jesus the Nazarene, the Sent-of-God. He hath lifted the veil from the unseen world. He hath taught us that the great God is our Father, and that he himself and we are brethren—that all mankind, from the lowest to the highest, in all nations and of all creeds—all, all are the offspring of God and all are alike cared for by Him, and that God now calleth on everyone to acknowledge him as their Lord and Master.

—Hafed, Prince of Persia