#sin cera

“During the Renaissance, Spanish sculptors who made mistakes while carving expensive marble often patched their flaws with cera—‘wax’. A statue that had no flaws and required no patching was hailed as a ‘sculpture sin cera’ or a ‘sculpture without wax.’ The phrase eventually came to mean anything honest or true. English word ‘sincere’ evolved from the Spanish sin cera—‘without wax’. David’s secret code was no great mystery—he was simply signing his letters ‘Sincerely’.”