What is summary of poem 'my shadow'?

here's one:

i got a shadow

got a sha sha shadow

got a shadow got a shadow

got a shoe

shoe shoe shoey shoe shoe shoe

a shoe for me none for you

i got a shadow i got a shoe

to live for

now I'll get some moo

oh no where's my sha sha shadow

bye bye world bye bye you

this poem is about a man who wonders what he should live for and then he realizes he has a shadow and a shoe and that he should live for that.But then he gets thirsty and he goes drink milk and on the way there he loses his shoe and when he comes back the sun sets and the shadow disappears so he kills himself.This poem teaches us all a lesson it's your job to find out what this poem means.To me it means never doubt what you have in life,what is the lesson to you.