I think the logic goes something like this: If we don't expect greatness, if we don't expect to find love and be healthy and successful, well we're not going to be disappointed when these things don't happen.
Mislim da je logika iza toga otprilike ova: Ako ne očekujemo velike stvari, ako ne očekujemo da ćemo pronaći ljubav  i biti zdravi i uspješni, onda nećemo biti razočarani kada se te stvari ne dogode.