I found this quote in James Fadiman’s new book. Thought it was interesting, and relevant to a few of my largest interests.
For it appears to me that among the many exceptional and divine things your Athens has produced and contributed to human life, nothing is better than those [Eleusinian] mysteries. For by means of them we have transformed from a rough and savage way of life to the state of humanity, and have been civilized. Just as they are called initiations, so in actual fact we have learned from them the fundamentals of life, and have grasped the basis not only for living with joy but also for dying with a better hope.
MARCUS TULLIUS CICERO DE LEGIBUS 2.14.36