He went to high school in the Colegio Nacional de la Capital (National School of the Capital) and started to study Law in the Faculty of Law and Social Sciences, from which he, short time after, dropped out of because he consumed his time participating in political activities since 1900.

In 1910, in times of government of the Liberal Party, the president Manuel Gondra required his services because of a limit problem with Bolivia.

He used the satire very creatively: when he was secretary in the Post Office, he used to ask for salary increases in verses with funny twists, something that he repeated sometimes when he was a diplomatic too.

He identified with the popular culture and learned the secrets of the city, in his writing is present the collective emotion of the people and the image of the Guaraní land.

Moreno ruled out the supposition of how influential was José Gaspar Rodríguez de Francia for the independence of Paraguay.

He maintained that: "We can not identify the Paraguayan independence with Francia or attribute him the formation of our nationality because these affirmation, moreover than being contrary to the normal development of countries, are opposite to the documents and historical proves.