Here's why:
* Reflexive pronouns refer back to the subject of the sentence. They are used when the subject of the verb is also the object of the verb.
* In this case, "He" is the subject, and "himself" is the object (He carries himself).
Intensive pronouns are used to emphasize the subject of a sentence. While "himself" can sometimes be used for emphasis, it's not the primary function in this sentence.