Photo source: Wikimedia Commons, Janet Flanner
George Gurdjieff (1866/77 - 1949) was a Russian philosopher best known for his analysis of consciousness and the self. Writer Colin Wilson said,
"During his lifetime Gurdjieff did not publish any books on the techniques of his teaching, and his pupils were bound to secrecy on the subject. Since his death in Paris in 1949, however, many of his works have been published, and there has been a flood of memoirs by disciples and admirers." (They Had Strange Powers, 1975)
The rest of this post is some quotes from Gurdjieff.
Consciousness
"The evolution of man is the evolution of his consciousness." (In Search of the Miraculous, 1949 posthumous)
"It is the greatest mistake to think that man is always one and the same. A man is never the same for long. He is continually changing. He seldom remains the same for even half an hour." (In Search of the Miraculous, 1949 posthumous)
"All religions speak about death during this life on earth. Death must come before rebirth. But what must die? False confidence in one's own knowledge, self-love and egoism." (All and Everything: Views from the Real World, 1973 posthumous)