Bahá’í Sacred Writings, Bahá’u’lláh, #221
O My Servants! Ye are the trees of My garden; ye must give forth goodly and wondrous fruits, that ye yourselves and others may profit therefrom. Thus it is incumbent on everyone to engage in crafts and professions, for therein lieth the secret of wealth, O men of understanding! For results depend upon means, and the grace of God shall be all-sufficient unto you. Trees that yield no fruit have been and will ever be for the fire.
O My Servant! The basest of men are they that yield no fruit on earth. Such men are verily counted as among the dead, nay better are the dead in the sight of God than those idle and worthless souls.
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.