Job 12:12

"In the length of time is wisdom, and in long life knowledge." In this passage it can be gathered that reason is natural to humanity as well as eating; or, at the beginning he said, "Are you really the only men?" Since I am a man, he means, I can understand what you also understand. "In length of time," he says, "is wisdom." It seems to me that he is criticizing them. "Do you believe," he says, "that you have found out all things?" Even if we possess reason to discern, we need a long time to find out things. "With him are wisdom and power, with him counsel and understanding." "All wisdom indeed," he says, "is in God, in his fullness, and it is in him without any need of time." … Therefore, is it possible that since we know that, we also know all things? I know that the wicked are punished; but I am punished despite my justice, so time is needed to understand this.

With the ancient is wisdom, and in length of days understanding.

For these sayings are set fast in the root of wisdom, which by continuance in living, are also made strong by the practice of deeds. But because there are many to whom at once longer life is given, and yet no grace of wisdom vouchsafed, it is further shewn with propriety on whose decision the gifts themselves depend.

Job asserted above (v.2) that what Sophar had said about the excellence of the greatness of God was evident to all men. Here he intends to show that men can come to an understanding of these things by the experience of divine power and wisdom in human affairs. First, then, he shows how men arrive at knowledge in things from experience, saying, "Does not the ear judge words" namely when it hears them, "and" does not "the palate of one eating," distinguish "flavor". Since experience is from sense, he fittingly shows the power of experience for the judgment of the senses especially in hearing and taste. For, since hearing is the most teachable of all the senses, hence it is most valuable in the contemplative sciences. Taste, however, is appreciative of food, which is necessary for the life of men; and hence through the judgment of taste he expresses the experience which one has about things in the active life. Because of this, from the judgment of the two senses, he shows the power of experience as much in speculative things as in practical things. When he then says, "There is wisdom in the ancients," this expresses the contemplative life because old men heard many things. "Prudence comes with advanced age." This expresses the active life because men taste many things in a long life, both helpful and harmful.