Por vs para and reflexive prepositional pronouns

Question

Can someone confirm that I'm understanding correctly the meaning of por vs para when using a reflexive prep pronoun?

• él debe hacerlo para sí -> "he should do it for himself"
• él debe hacerlo por sí -> "he should do it (by) himself"

Thanks!

Chris

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For bonus points, how would one articulate the impersonal versions of same?

• one should do it for oneself
• one should do it (by) oneself

Answer 1

* one should do it for oneself
* one should do it (by) oneself

The same form means himself, itself, oneself

mismo is often included for emphasis

por sí mismo= by oneself

Se debe hacerlo por sí mismo.

Answer 2

Check out this reference: http://www.spanishdict.com/answers/100035/para-and-por

por & para

put into live link - 0074b507, Feb 5, 2010