Tao Te Ching

“Omar Kyayyam, the only man known to me who was both a poet and a mathematician, reformed the calendar in 1079. His best friend, oddly endough, was the founder of the sect of the Assassins, the 'Old Man of the Mountain' of legendary fame.”

— Bertrand Russell 1872 – 1970 CE
“20th century Voltaire”
from History of Western Philosophy