Knowledge or Nonsense

I woke this morning with the gist of these lines floating in my head.  All I had to do was to sit and type.

I walk up and down the busy street
Of knowledge: drops incessantly at my feet.
I climb, clamber and struggle through
For knowledge isn't what I do.

If knowledge, understanding you do yearn
Then don't look here for you will learn
Only the random thoughts of a fat old fool
But for arrant nonsense let this be your school

I’ll let you judge the truth of this or even if I believe my own words but, whatever, don’t take them too literally.  Of course I want you to keep calling!