However, because altruism ultimately benefits the self in many cases, the selflessness of altruistic acts is difficult to prove.
haʊˈɛvɚ, bɪkˈʌz ˈɔːltɹuːˌɪzəm ˈʌltᵻmətli bˈɛnɪfˌɪts ðə sˈɛlf ɪn mˈɛni kˈeɪsᵻz, ðə sˈɛlfləsnəs ʌv ˌɔːltɹuːˈɪstɪk ˈækts ɪz dˈɪfɪkəlt tə pɹˈuːv.