He met his future wife Janet Buckley in 1930 on a pilgrimage organised by the international Christian movement Toc H. Collin read Ouspensky's A New Model of the Universe for the first time the same year.

[5] He says: Collin studied the sequence of European civilizations, finding a pattern that would follow a planetary scale where the durations are 10 times longer than a human life.

His book The Theory of Eternal Life was published anonymously in 1949, the same year in which he wrote the play Hellas, which represents the various stages of Greek civilization.

In the spring of 1954, a group including Collin, under the name of "The Unicorn Actors", gave twelve public performances of Henrik Ibsen's Per Gunnet (Peer Gynt) for the residents of the town of Tlalpan.

He travelled to Europe and the Middle East in 1954 and 1955, the main purpose of which was to collect material and establish links with the esoteric schools of the past.

As a result of the distribution of books by Ediciones Sol in Latin America, Collin's groups began to appear in Peru, Chile, Argentina and Uruguay, and contacts were established in several other countries of the American continent.

In January 1955, Rodney visited groups in Lima and Buenos Aires, and then went to Cusco and Machu Picchu to study the remains of ancient civilizations.

On a flat stone is written the prayer he wrote one month before he died: A memorial plaque for Collin has been placed by the bell tower at the Plaza de Armas in Cusco.