The heart aflame and a book have always featured in almost any Augustinian-related logo, and have great significance to everybody in the tradition of Augustine.
The heart is aflame, and pierced by an arrow; both these suggest love - the love of God and of all humanity.
The arrow, piercing the heart and causing a droplet of blood, also reminds us of the prayer of Saint Augustine, "Lord, you have wounded me with your Word."
The book represents the teachings of the gospel, the writings of Augustine, and the commitment of the Order of Saint Augustine to learning, for Augustine said that the whole world is our classroom for our whole life.
The present logo is about forty years old, and is thought to have been designed in the United States.
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Older versions of the logo were more ornate, and sometimes also featured an Augustinian cincture (cinctura) and the mitre and crozier ("rod") of a bishop.
The Augnet logo very obviously displays the Augustinian symbols, and adds the globe to indicate its worldwide electronic reach.