Manly Palmer Hall (1901–1990) was a Canadian-born author, lecturer, astrologer and mystic. He is best known for his 1928 work The Secret Teachings of All Ages. Over his 70 year career, he gave thousands of lectures, including two at Carnegie Hall, and published over 150 volumes.(Wikipedia)

Manly Palmer Hall (1901–1990) was a Canadian-born author, lecturer, astrologer and mystic. He is best known for his 1928 work The Secret Teachings of All Ages. Over his 70 year career, he gave thousands of lectures, including two at Carnegie Hall, and published over 150 volumes.(Wikipedia)

Nicholas Roerich (1874-1947) was a Russian painter, writer, archaeologist, theosophist, philosopher, and public figure. Trained as an artist and a lawyer, his main interests were literature, philosophy, archaeology, and especially art. Roerich was a dedicated activist for the cause of preserving art and architecture during times of war. He was nominated several times to the longlist for the Nobel Peace Prize. The so-called Roerich Pact was signed into law by the United States and most nations of the Pan-American Union in April 1935. (Wikipedia)

Pierre Teilhard De Chardin SJ (1881–1955) was a French idealist philosopher and Jesuit priest who trained as a paleontologist and geologist and took part in the discovery of Peking Man. (Wikipedia)

Plato (428/427 or 424/423 – 348/347 BC) was an Athenian philosopher during the Classical period in Ancient Greece, founder of the Platonist school of thought, and the Academy, the first institution of higher learning in the Western world. (Wikipedia)

Rabindranath Tagore FRAS (Robindronath Thakur)(1861-1941), also known by his pen name Bhanu Singha Thakur (Bhonita), and also known by his sobriquets Gurudev, Kabiguru, and Biswakabi, was a polymath, poet, musician, and artist from the Indian subcontinent. He reshaped Bengali literature and music, as well as Indian art with Contextual Modernism in the late 19th and early 20th centuries. Author of the "profoundly sensitive, fresh and beautiful verse" of Gitanjali, he became in 1913 the first non-European to win the Nobel Prize in Literature. (Wikipedia)

René Descartes (1596-1650) was a French philosopher, mathematician, and scientist. A native of the Kingdom of France, he spent about 20 years (1629–1649) of his life in the Dutch Republic after serving for a while in the Dutch States Army of Maurice of Nassau, Prince of Orange and the Stadtholder of the United Provinces. One of the most notable intellectual figures of the Dutch Golden Age, Descartes is also widely regarded as one of the founders of modern philosophy. (Wikipedia)

Roger Bacon OFM (Latin: Rogerus or Rogerius Baconus, Baconis, also Frater Rogerus) (c.1219/20-c.1292), also known by the scholastic accolade Doctor Mirabilis, was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empiricism. He is sometimes credited (mainly since the 19th century) as one of the earliest European advocates of the modern scientific method. Bacon applied the empirical method of Ibn al-Haytham (Alhazen) to observations in texts attributed to Aristotle. Bacon discovered the importance of empirical testing when the results he obtained were different than those that would have been predicted by Aristotle. (Aristotle had never performed experiments to verify his explanations of his observations of nature; in ancient times, constructing an artificial situation was not considered a valid way to discover the laws of nature. (Wikipedia)

Roger Bacon OFM (Latin: Rogerus or Rogerius Baconus, Baconis, also Frater Rogerus) (c.1219/20-c.1292), also known by the scholastic accolade Doctor Mirabilis, was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empiricism. He is sometimes credited (mainly since the 19th century) as one of the earliest European advocates of the modern scientific method. Bacon applied the empirical method of Ibn al-Haytham (Alhazen) to observations in texts attributed to Aristotle. Bacon discovered the importance of empirical testing when the results he obtained were different than those that would have been predicted by Aristotle. (Aristotle had never performed experiments to verify his explanations of his observations of nature; in ancient times, constructing an artificial situation was not considered a valid way to discover the laws of nature. (Wikipedia)

Rudolf Joseph Lorenz Steiner (1861–1925) was an Austrian philosopher, social reformer, architect, and esotericist. (Wikipedia)

Rudolf Joseph Lorenz Steiner (1861–1925) was an Austrian philosopher, social reformer, architect, and esotericist. (Wikipedia)

Rudolf Joseph Lorenz Steiner (1861–1925) was an Austrian philosopher, social reformer, architect, and esotericist. (Wikipedia)

Rudolf Joseph Lorenz Steiner (1861–1925) was an Austrian philosopher, social reformer, architect, and esotericist. (Wikipedia)

Søren Aabye Kierkegaard (1813-1855) was a Danish philosopher, theologian, poet, social critic and religious author who is widely considered to be the first existentialist philosopher. He wrote critical texts on organized religion, Christendom, morality, ethics, psychology, and the philosophy of religion, displaying a fondness for metaphor, irony and parables. Much of his philosophical work deals with the issues of how one lives as a "single individual", giving priority to concrete human reality over abstract thinking and highlighting the importance of personal choice and commitment. (Wikipedia)