A quote
He says: “Just as every science and every art should possess an element that is palpable and capable of being grasped by the senses (their source of origin and growth), even so the happy life derives its foundation and its beginnings from things that are palpable, and from that which falls within the scope of the senses. Surely you admit that the happy life takes its beginnings from things palpable to the senses.”
Seneca·Letter 124 — On the True Good as Attained by Reason (§6)·trans. Gummere