Humans love to categorize things. It helps them to understand the world. You can already see that in very young babies when they develop their speaking skills. For example, first they only distinguish people and animals and so it can happen that all animals are called dog until the baby understands that a cat has 4 legs as well but is different from a dog. As development and understanding grows ..

Those who say I know are countless Those who say I don't know don't see. Knowledge is something to accumulate. Wisdom is something to be emptied. It is easy to fill but difficult to empty. If you say 'I know, I know'. you get further and further away from the root. If you say 'I don't know, I don't know'. you get closer and closer to the root. Phoenix

One can gather knowledge all his/her life, read all the books in the world, and look for all kind of teachers and philosophers - and still not become wise. On the other hand, a person with no degree or high education who has simple principles in life and lives according to it, can be called wise.This is because one becomes only wise when one makes use of the knowledge and lives according to it.F..