“The stone that was rolled before Christ's tomb might appropriately be called the philosopher's stone because its removal gave not only the pharisees but, now for 1800 years, the philosophers so much to think about.”
“There are more riddles in a stone than in a philosopher's head”
“The philosophers stone is just an allegory. It represents everything that man wants and can never have.”
“Unfortunately robots capable of manufacturing robots do not exist. That would be the philosopher's stone, the squaring of the circle.”
“If you know how to spend less than you get, you have the philosopher's stone.”
“We look for the Secret - the Philosopher's Stone, the Elixir of the Wise, Supreme Enlightenment, 'God' or whatever...and all the time it is carrying us about...It is the human nervous system itself.”