17 And Saul said unto Michal, Why hast thou deceived me so, and sent away mine enemy, that he is escaped? And Michal answered Saul, He said unto me, Let me go; why should I kill thee?
Now Michal’s name means “reign,” because sin reigned over our nature up to that time. And at the very time he himself was born, he [the Lord in the figure of David] went out through a window. And the window indicates the return to the light again of the one who made himself known to those sitting in darkness and the shadow of death.And his image is seen on the bed. For the angel says to those seeking the Lord in the tomb, “Why do you seek the living with the dead? He is not here; he is risen.” “Behold the place” in which he lay. Those seeking the Lord saw the tomb in which he was buried empty of the body of the one they were seeking. Only the burial sheets were in it. We think, therefore, that the image of David on the bed signifies the resurrection of the Lord in the tomb, through which the true averting of our death through expiatory sacrifice occurs.
And not in war only, but also in peace the need of deceit may be found, not merely in reference to the affairs of the state but also in private life, in the dealings of husband with wife and wife with husband, son with father, friend with friend, and also children with a parent. For the daughter of Saul would not have been able to rescue her husband out of Saul’s hands except by deceiving her father. And her brother, wishing to save him whom she had rescued when he was again in danger, made use of the same weapon as the wife.
And Saul said to Michal, Why have you deceived me thus? etc. The unbelieving Jews said to the early Church: Why, having neglected our traditions, did you prefer to believe in Jesus and confess that by rising He put our guards to flight? To which she replied: Because He, she said, threatens not just me, but all who refuse to believe in Him and confess these things, with eternal death.
[AD 395] Gregory of Nyssa on 1 Samuel 19:13-17