Because if your mind tries to convince you you're incapable of something, and you believe it, then like those two toddlers, you'll begin to feel helpless and you'll stop trying too soon, or you won't even try at all.
Nes jei jūsų smegenys bando jus įtikinti, kad negalit kažko padaryti, o jūs patikite, tuomet kaip tie du mažamečiai pasijusite bejėgiai ir greitai nustosite stengtis, o gal ir išvis nesistengsit.