The wisest person of all is one who ________________?

...has had many trying experiences and has learned from them. Usually, the wise pass on their wisdom.

Has seen all the toughest sides of life..

Nonexistant. No one is THE MOST WISE.

Some are certainly more wise than others but there is no way to determine the most wise. Everyone makes mistakes, everyone.

eat pork. I guess :)

Knows that they know Nothing at all.

...Learns from the mistakes of others

Everyone is screwed up in one way or another. There is no exceptions to that rule.

knows themselves.

isn't self-righteous, but humble.

wisest person never talks bad about him/herself.