[124] For God is the author of virtuous laughter and joy; so that we must look upon Isaac not as the offspring of creation, but as the work of the uncreate God. For if Isaac, being interpreted, means laughter, and if it be God who is the cause of laughter according to the true testimony of Sarah, then he may be most properly said to be the father of Isaac. And he also gives a share to Abraham of his own proper appellation, to whom, when he eradicated pain from wisdom, he gave rejoicing as an offspring.