“All humanity must obtain a livelihood by sweat of the brow and bodily exertion, at the same time seeking to lift the burden of others, striving to be the source of comfort to souls and facilitating the means of living. This in itself is devotion to God. Bahá’u’lláh has thereby encouraged action and stimulated service. But the energies of the heart must not be attached to these things; the soul must not be completely occupied with them. Though the mind is busy, the heart must be attracted toward the Kingdom of God in order that the virtues of humanity may be attained from every direction and source.“

– ‘Abdu’l-Bahá, The Promulgation of Universal Peace