Food, drink, shelter and a degree of material comfort are essential, but human beings cannot and never will find fulfillment in these necessities. Nor is contentment to be found in the somewhat more intangible material attainments such as social recognition or political power. Ultimately, not even intellectual achievement satisfies our deepest needs.

Bahá’í International Community, 1995 Oct, Turning Point For All Nations

Man, because of his animal nature, is a selfish being. The instinct for survival drives him to find food, clothing and other necessities of life. Then he seeks after security, wealth, power and similar possessions. All these, as well as his intellectual, emotional and spiritual pursuits, revolve around his own self, and are aimed to serve his well-being, prosperity and happiness. He is always in search of things to add to his possessions as long as he can derive some benefit from them. When man encounters the Faith of God and recognizes its glory he tends to add it, in the usual way, to his other treasures. He puts his religion on a par with his other pursuits, and selfishly expects to benefit from it just as he benefits from his other possessions. He wants the Faith of God to serve him and bring him joy and satisfaction. This concept and practice is attachment to the world and against the law of creation. For God has not given His Revelation in order that it may satisfy the selfish interests of man. On the contrary, man is expected to arrange his life in such a way as to serve and revolve around the Revelation of God. If the individual follows the Cause of God unselfishly and with pure motive, his life will be so blessed that the powers and attributes of God will be revealed within his soul. Whereas if he seeks these attributes to gratify his own ego, such a motive will cause him to be deprived of the outpouring of God's grace and bounty.

Adib Taherzadeh, The Revelation of Bahá’u’lláh v 2, p. 37