POLYGAMY IS ON CONDITION OF JUSTICE

      Having more than one wife, and up to four, is permitted on the condition that man should be perfectly just and equitable to all his wives; a condition that may seem almost impossible. The man might be just and fair in material and economical matters; but of surety he won't be able to love them all in the same scale and measure. Therefore the verse implies that he should at least not discard one of them, casting her off of attention as if she is in suspension. So the purpose of doing justice among your wives is not equality in loving them, which is not in the husband's hand, but it lays in heart. Equality is rather wanted in their dowers, provisions, opportunities, expenditures, and other material gifts, or whatever it might be.