4836. 'And Onan knew that the seed would not be his' means a loathing and hatred. This is clear from the representation of 'Onan' as evil, dealt with in 4823, 4824; and because 'not providing seed for a brother', or not performing the duty of a brother-in-law, means having no desire for the good and truth of the Church or the continuation of it, 4834, the words used here mean a loathing and hatred, for evil is nothing else than loathing and hatred directed against the good and truth of the Church.