The first principle is that inequities in the distribution of resources and means of production should be rectified through voluntary sacrifices on the part of members of society. On the one hand, this would contribute to the economic well-being of society; and on the other it would provide an opportunity to make a provision for the life to come. This is why the Holy Prophet(sa) has said that a man who puts a morsel of food into his wife’s mouth with a desire to earn merit in the sight of God, does a deed equal in virtue to giving alms.
The above example is an act in which the husband’s own desire plays a part. He is fond of his wife and derives pleasure from caring for her. However, if his motive includes the desire to please God and to gain His nearness, he can turn his domestic obligations into a virtuous deed. He would enjoy the food as before, and his wife would appreciate the clothes he gives her as before. But once he does all this because God loves those who take care of their wives, then not only will he get satisfaction from his own act, but he can also expect a reward from God for doing something for His pleasure.