Grande Idée
In 1886, he made a trip to Greece out of which he wrote "My Journey", advocacy of Demotic Greek (with some remarks on the Ancient Greek pronunciation), which connected it with the national integration ("Megali Idea"). So he became the mentor of the Demotic side in the Greek language question. Because of his stance, in favour of "Demotiki", he was heavily criticized by both the conservative political and educational establishment in Greece (most notably professor Georgios Hatzidakis), and he was often under attack by various newspapers.