Does "They themselves" need commas?

Solution 1:

The following option poses no confusion in my mind, and I wouldn't anticipate confusion in the mind of a native speaker:

a) They themselves can state their feelings.

The supporting data of the corpus suggests that the expression they themselves is not usually separated by a comma, and since it is the subject of the verbal phrase can state, it should not be separated from the predicate with a comma.

Themselves is a reflexive pronoun, and in the phrase they themselves, it is an intensive form, which is always treated as a restrictive appositive that is not offset with a comma.

Note that they all have reflexive and intensive forms which depends on where they are in the sentence.

Jim bought himself a book (reflexive)
Jim himself bought a book (intensive)
Asjad brought himself a book (reflexive)
Asjad himself brought a book (intensive)

Intensive pronouns usually appear right near the subject of the sentence.