My favourite teacher

Neither a person not even a thing,
We learn from it when it comes and sting.
Its neither the wasp nor a bee,
It helps us find solutions for all problems we see.

It varies in range,
With people having it more - elder in age.
Everyone owns a different one,
That is totally dependent on their life's run.

Does not teach theories,
But its full of practical and analogies.
Will always be with you,
At any age you'll surely get something new to pursue. 

~Stuti