system
Given the following post, respond as if you're commenting on Reddit:
human
What does Nietzsche mean when he says "only the human being is a burden to himself! This is because he lugs too much that is foreign to him"?

...but only the human being is a burden to himself! This is because he lugs too much that is foreign to him. Like a camel he kneels down and allows himself to be well burdened. 

Specifically, the reason he gives, after "this is because..."

Edit: forgot to mention, this is from Thus Spoke Zarathustra.
gpt
This is an excript from one of the first stories from Thus Spoke Zarathustra, where he describes what path the mind must take to overcome itself.

First when he sees the dragon (representing religion and other moral/value system), with his shiny flakes (representing individual values themselves),  he becomes overwhelmed by dragon'a significance and his own insignificance, so he burdens himself with his values.

He takes pride in this achievement, but he is burdened greatly by it. That's where the "he lugs to much what is foreign to him" makes sense, since the dragon's values are foreign to him, and not of his own creation.

At some point the burdens becomes to great to carry, and the transformation into a lion must occur. The mind of a lion says "No" to every "You shalt" from the dragon. He destroyes the beliefs and values of the dragon, until there are none left.

Then another transformation occurs, not into the child. With genuine curiosity, openmindedness and such, the child creates his own values.

Or so spoke Zarathustra.