3260. 'That God blessed Isaac his son' means the start of the representation [of the Lord] by means of Isaac. This becomes clear from the meaning of 'God blessed'. When any task was to be begun it was customary for the ancients to say 'May God bless!' by which was meant the same as by the wish, 'May it be happy and prosperous!' Consequently in the more remote sense by 'May God bless!' as by 'May it be happy and prosperous!' the start was meant, here the start of the representation by means of Isaac, because it follows directly after the ending of the representation by means of Abraham, meant by his death.