Himself is a reflexive pronoun, being the reflexive form of he. It is used especially in the following ways:
as an object that refers to the same male who is the subject of the sentence or who is mentioned somewhere earlier in the sentence: He had prepared himself for this important meeting. ♦ Clive was feeling rather pleased with himself. ♦ I asked him a few questions about himself. ♦ Florian’s wife was, like himself, a refugee.
after a singular noun or the pronoun ‘he’ for emphasis: a suggestion that came from the president himself