10- Song of the open road by Walt Whitman 

Here is the test of wisdom, 

Wisdom is not finally tested in schools, 

Wisdom cannot be pass’d from one having it to another not having it, 

Wisdom is of the soul, is not susceptible of proof, is its own proof, 

Applies to all stages and objects and qualities and is content, 

These line explain that the knowledge you have in the school or in another place don't said that you are the smartest or the best in the school, if you got a 10 in all the exams don't said that you will have a great job or a bad job.The wisdom is that you have and it dont matter if you are smart or not, you can have that from your family or because you are good at something.