difference between confirm and affirm

af·firm
[əˈfərm]
VERB
state as a fact; assert strongly and publicly:
"he affirmed the country's commitment to peace" · [more]
synonyms: declare · state · assert · proclaim · pronounce · attest · [more]
offer (someone) emotional support or encouragement:
"there are five common ways parents fail to affirm their children" · [more]

con·firm
[kənˈfərm]
VERB
establish the truth or correctness of (something previously believed, suspected, or feared to be the case):
"if these fears are confirmed, the outlook for the economy will be dire" · [more]
administer the religious rite of confirmation to:
"he had been baptized and confirmed"

so, he confirmed the country's commitment to peace is wrong? i don't the difference in meaning, if you could explain that?

The prefix con implies with, so you might 'confirm' what somebody has already 'affirmed'. i.e. An affirmation can stand as a primaru (stand alone) statement of a position whereas a confirmation is a supporting statement.
e.g.
1 She affirmed that she was a practising Christian.
2 This was confirmed by her son who spoke of her charity work.
But
3 When asked if she went to church, she confirmed that she was a practising Christian.
Or
4 My suspicions as to the cause of my indigestion were confirmed by the doctor.

Only #1 is stand alone affirmation.

hmm, okay. thank you