There is a Greek word, "philotimo", that cannot be translated into English. There is a nice video on YouTube, where several famous Greek people try to explain the meaning of this word:
But there is a simple way to explain it. Back in August 1999, an earthquake hit Turkey, killing thousands of people. One of the first countries to send help was Greece, although the relationships between these two countries were never good at all.
That is philotimo!
That is philotimo!