"If you have any doubt what to study, study endgames. Openings teach you openings. Endings teach you chess."
GM Barcza was helping GM Szabo prepare for a candidates' tournament. They were working on a particular line but couldn't figure it all out. Barcza finally said, "It must be tried out! And let the better player win!" Szabo cried out, "That is exactly what I do not want to happen!"