 Chandan authored the first prakalpana book, "Porimandal", which was published on Prakalpana Day (6 September 1975).In the early 1970s he developed the philosophy underlying the Prakalpana Movement and its counterpart (the Sarbangin Poetry Movement), which he called "Chetanavyas".According to Chandan, what is seen everywhere is change (in the outer world of matter and in the inner world of sense and consciousness).