Note that the attempted paraphrase can be wrong because: it uses exact wording from the source without quote marks; or it fails to credit Frankl as the source of the words and/or the idea; or it fails to quote the source accurately.
The source (from page 135 of Victor Frankl’s book Man’s Search for Meaning):
A human being is not one thing among others; things determine each other, but man is ultimatly self-determining. What he becomes – within the limits of endowment and environment – he has made out of himself.
The attempted paraphrase:
As Frankl puts it, “A human being is not one thing among others. Things determine each other, but man is self-determining. What he becomes, within the limits of endowment and environment, he makes out of himself” (135).