Throughout Baha’u’llah’s ministry he exhorted people to engage in a profession or trade of some kind. To Baha’is, work performed in the spirit of service is actually worship.
In The Hidden Words Baha’u’llah makes the following statement:
O My Servant! The best of men are they that earn a livelihood by their calling and spend upon themselves and upon their kindred for the love of God, the Lord of all worlds. – p. 51.
In fact, Baha’u’llah elevated work to the level of worship of God:
It is enjoined upon every one of you to engage in some form of occupation, such as crafts, trades and the like. We have graciously exalted your engagement in such work to the rank of worship unto God, the True One. Ponder ye in your hearts the grace and the blessings of God and render thanks unto Him at eventide and at dawn. Waste not your time in idleness and sloth. Occupy yourselves with that which profiteth yourselves and others. Thus hath it been decreed in this Tablet from whose horizon the daystar of wisdom and utterance shineth resplendent.
The most despised of men in the sight of God are those who sit idly and beg. Hold ye fast unto the cord of material means, placing your whole trust in God, the Provider of all means. When anyone occupieth himself in a craft or trade, such occupation itself is regarded in the estimation of God as an act of worship; and this is naught but a token of His infinite and all-pervasive bounty. – Tablets of Baha’u’llah, p. 26.
The specific occupation is not important, so long as it is done in the spirit of service. Abdu’l-Baha explains:
In the Baha’i Cause arts, sciences and all crafts are (counted as) worship. The man who makes a piece of notepaper to the best of his ability, conscientiously, concentrating all his forces on perfecting it, is giving praise to God. Briefly, all effort and exertion put forth by man from the fullness of his heart is worship, if it is prompted by the highest motives and the will to do service to humanity. This is worship: to serve mankind and to minister to the needs of the people. Service is prayer. A physician ministering to the sick, gently, tenderly, free from prejudice and believing in the solidarity of the human race, he is giving praise. – Paris Talks, pp. 176-177.
Extolling those who devote their lives for the benefit of others, Abdu’l-Baha writes:
Every imperfect soul is self-centered and thinketh only of his own good. But as his thoughts expand a little he will begin to think of the welfare and comfort of his family. If his ideas still more widen, his concern will be the felicity of his fellow citizens; and if still they widen, he will be thinking of the glory of his land and of his race. But when ideas and views reach the utmost degree of expansion and attain the stage of perfection, then will he be interested in the exaltation of humankind. He will then be the well-wisher of all men and the seeker of the weal and prosperity of all lands. This is indicative of perfection. – Selections from the Writings of Abdu’l-Baha, p. 69.
Again, there are those famed and accomplished men of learning, possessed of praiseworthy qualities and vast erudition, who lay hold on the strong handle of the fear of God and keep to the ways of salvation. In the mirror of their minds the forms of transcendent realities are reflected, and the lamp of their inner vision derives its light from the sun of universal knowledge. They are busy by night and by day with meticulous research into such sciences as are profitable to mankind, and they devote themselves to the training of students of capacity. It is certain that to their discerning taste, the proffered treasures of kings would not compare with a single drop of the waters of knowledge, and mountains of gold and silver could not outweigh the successful solution of a difficult problem. To them, the delights that lie outside their work are only toys for children, and the cumbersome load of unnecessary possessions is only good for the ignorant and base. Content, like the birds, they give thanks for a handful of seeds, and the song of their wisdom dazzles the minds of the world’s most wise. – Abdu’l-Baha, The Secret of Divine Civilization, p. 21.
Finally, Abdu’l-Baha describes such service to humanity as the highest source of happiness:
And the honor and distinction of the individual consist in this, that he among all the world’s multitudes should become a source of social good. Is any larger bounty conceivable than this, that an individual, looking within himself, should find that by the confirming grace of God he has become the cause of peace and well-being, of happiness and advantage to his fellow men? No, by the one true God, there is no greater bliss, no more complete delight. – Ibid., pp. 2-3.