There were once three fishes in a pond. One fish said to the other two: "The water in this pond is getting less and less; the pond will dry up soon. Let us go to some lake which will not dry; the fisherman is waiting to catch us and eat us". The second fish said: "O, it is a long way off. We might get a shower of rain and the pond will not get dry". The third one said: "Your mind is full of needless fears; you were always so. No fisherman knows we are here".
As anticipated, the fisherman did come and trapped all three. The fisherman is no other than Death. The length of our life here is the level of water in the pond. We are fishes that are blind and stupid, who will not listen to warnings.