After these initial studies he obtained his bachelor's degree in Civil Law from the University of Salamanca in 1891, the year of his ordination to the priesthood in Ávila on July 25.
Paredes received a doctorate in Civil Law in 1898 with a dissertation entitled La Iglesia y el Estado en la Teoría jurídico-social de santo Tomás comparada con las Teorías modernas sobre el mismo asunto.
He founded the Magazine «Misiones Dominicanas» and acquired new properties to build the new campus of the University of Santo Tomás in Manila.
He founded the Apostolic School of La Mejorada, near Olmedo, Valladolid, and extended the presence of the Province to the United States (in Tangipahoa, and the Center of Studies at Rosaryville, New Orleans, (Louisiana), which was inaugurated in 1911).
In 1917 he took charge of the construction and was made superior of the Convent of the Rosary of Madrid (at Calle Conde de Peñalver) and for nine years, he dedicated himself to the ministry and the direction of souls.
In 1927, Paredes purchased from the Italian government the ancient convent of Saints Dominic and Sixtus in Rome, returning it pleno iure to the Dominican Order.
The monastery, which formerly had been established by Pope Pius V as a convent for Dominican nuns in 1575 had come into the possession of the Italian government in 1873 by virtue of the law of suppression of religious orders.