non ho la minima idea di cosa significhi (spero niente di imbarazzante) me l'hanno inviata a chiusura di una mail, credo (spero) sia un motto benaugurante
Nope. Israel means the country unless we are talking about the concept. In most translations Israel is the country and Jewish is the Jewish people. Israel, as you know is not only Jewish, but is also Moslem and Christian, so we do not, today, use that term regarding Israeli unless it is in a biblical sort of way.
The concept is a very complicated one. Israel is used to denote the Jewish people, but it is still left over from the time when there were two kingdoms after Israel broke away from Judea. Over time Israel has come to be associated with the Jewish people. Israel has now also become associated with a modern state which is made up of Jews, Moslems and Christians, so we have a spiritual defination reaching back several thousand years, and a modern defination reaching back only a few years. Then there are the Christians who consider themselves the new Israel, so it really depends on the frameword from which you are translating.