I think what really counts is your ability to assimilate and pass (you are not wise if you don't share your wisdom) your understanding that comes directly from your own experience, it doesn't matter if you are 20 or 80 ...but obviously if you are 80 you have a whole bunch of experience ! ^^ (-:

The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your mind.

Speaking of the relation between wisdom and age, I think the very reason in it is beacause the experience one accumulated along the years. So what counts most in wisdom is about someone's experience, and his/her serious thinking in those experiences. A seemingly young person can be of wisdom if he contemplates while undergoing some things, whereas a senior can be shallow as well. People say that bad fortune makes someone grow up, and I tend to agree with that. Insightness and profoundness can usually be reached after the painful experience. Therefor in my opinion, experience and the ability to think through are what makes the wisdom. ^^

age means someone get muturity as time goes by, they have enough experience and social communication,but sometimes one is wisdom means she or he can deal with something in good ways. it is only my opinion.

I think it depends on the definition of wisdom. After all, one may be worldly wise but not so in other matters. Interestingly the Greek word 'philosophia' means ‘love of wisdom.’