Heliade's most influential contributions are related to his interest in developing the modern Romanian language, in which he synthesized Enlightenment tenets and Romantic nationalist ideals of the 1848 generation. At a time when Romanian was being discarded by the educated in favor of French or Greek, he and his supporters argued in favor of adapting Romanian to the requirements of modernization; he wrote: "Young people, preoccupy yourselves with the national language, speak and write in it; prepare yourselves for its study, for its cultivation,—and cultivating a language means to write in it about all sciences and arts, about all eras and peoples. The language alone unites, strengthens and defines a nation; preoccupy yourselves with it first and foremost, as, through this, you shall be carrying out the most fundamental of policies, you shall be laying the foundation of nationality".