Without contraries there is no progression. Attraction and repulsion, reason and energy, love and hate are necessary to human existence. William Blake, The Marriage of Heaven and Hell
If a man take a wife, and she bear him no children, and he intend to take another wife: if he take this second wife, and bring her into the house, this second wife shall not be allowed equality with his wife.
If she is not innocent, but leaves her husband, and ruins her house, neglecting her husband, this woman shall be cast into the water.