The Short Version
No credible evidence supports the claim that Einstein ever made this statement about Petar Dunov. Comprehensive Einstein quote databases, archival scholars, and independent investigators find zero mention of Dunov in Einstein's writings or verified remarks. The earliest traceable source is a 2007 Bulgarian television interview with a Dunov disciple — decades after Einstein's death. The numerous websites reproducing the quote trace back to this same unverified lineage, representing a well-documented pattern of spurious Einstein attributions.