From the heart: pay heart as an embodiment of sincerity Michal Parzuchowski SWPS, University of Social Sciences and Humanities, ul. Polna 16/20, 81-745 Sopot, Poland Aleksandra Szymkow SWPS, University of Social Sciences and Humanities, ul. Polna 16/20, 81-745 Sopot, Poland Wieslaw Baryla SWPS, University of Social Sciences and Humanities, ul. Polna 16/20, 81-745 Sopot, Poland