Were economic and social systems to be based upon such moral and spiritual foundations, man would be able both to achieve happiness and to put an end to human suffering and misery on earth. The high ethical principles which the Qur'an poses as the very content of its creed, as well as its faith, command men to remove any shortcoming or misery in the world which it is possible to remove. A person disciplined by these principles and gripped by their ethic will condemn selfish interests, the basis of present economic life and the source of misery for all mankind. That is why Islam categorically forbids charging interest for loans. God said, "Those who appropriate interest are like men possessed of the devil." [Qur'an, 2:275] Further, the Qur'an says, "The interest which you impose seeking to increase your wealth will not bring about any increase in the sight of God. Rather, it is the zakat which you pay for the sake of God alone, that brings about such increase of your fortune. [Qur'an, 30:39]