Wisdom

As Os Guinness puts it:

As we get older, our reflexes are slower and our powers of retention smaller, and we certainly have no more idea now of what the future may hold. But a large part of wisdom comes from the accumulated experience of knowing what the future will not hold, and that vital wisdom increases as we get older. In other words, comprehension and wisdom improve even as memory falters. Wisdom is a matter of the quality of what we know, not the quantity.
--- (Prophetic Timeliness - A Challenge to the Idol of Relevance)

How comforting.