Professor Argir Hadjihristev, a Bulgarian expert on the subject of aging, says: “The basic evil is, first of all, not being content with the little that a person has. ”
Bulgaaria vananemisekspert, professor Argir Hadjihristev, sõnab: „Inimese suurim vaenlane on see, kui ta pole rahul selle vähesega, mis tal on. ”