“the purpose in their minds”

A picture or representation of human figures ought to be done in such a way that the spectator may easily recognize, by means of their attitudes, the purpose in their minds…if you have to represent a man of noble character in the act of speaking, let his gestures be such as naturally accompany good words…” — Leonardo Da Vinci, Leonardo’s Notebooks

When Leonardo painted his most famous Fresco, The Last Supper, preserved inside the refectory (dining hall) of Santa Maria delle Grazie, in Milan he was likely representing men of “noble character”, Jesus Christ and his apostles.