Albert Einstein Quotes about Appreciation
Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.21, St. Martin's Press
Albert Einstein, George Bernard Shaw (2012). “Einstein on Cosmic Religion and Other Opinions and Aphorisms”, p.93, Courier Corporation
Albert Einstein (2013). “Albert Einstein, The Human Side: Glimpses from His Archives”, p.89, Princeton University Press