His most important research was conducted in the fields of 19th century Romanticism and 16th century mysticism in Spain: a number of his critical works were translated into Spanish and republished in Spain.
From her early years, he writes, she was favored by ecstasies and visions and became a noted mystic of her era.
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As one of the early Spanish mystics, he was a pioneer in the use of meditative techniques, having been influenced both by the methodical prayers of the Devotio Moderna group, and the writings of Louis Barbo.