This rich farmer, who thinks that he need not fear bad harvests for many a year (v. 19), is a fool (v. 20), that is, according to the biblical meaning of the term, a man who in practice denies the existence of God (Ps. 14.1). He does not take God into account, and fails to see the sword of Damocles, the threat of death, hanging over his head. Here it is necessary to avoid a too obvious conclusion. We are not to think that Jesus intended to impress upon his audience the ancient maxim, 'Death comes suddenly upon man'. Rather do all the appeals and parables of warning taken together show that Jesus is not thinking of the inevitable death of the individual as the impending danger, but of the approaching eschatological catastrophe, and the coming Judgment. Thus here too in Luke 12:16-20 we have an eschatological parable.
Jesus expected his hearers to apply its conclusion to their own situation: we are just as foolish as the rich fool under the threat of death is we heap up property and possessions when the Deluge is threatening.
What is coming? The jackal, who feeds on corpses, will attack the Son of Man as he attacked the Baptist (Luke 13:32). That will be the prelude. Then will come the great hour of temptation, the final assault of the Evil One, destruction of the Temple, and unspeakable calamity (Luke 23.29), and thereafter the judgment of God.