“Temperance purges feelings, awakens spiritual faculties, strengthens inner awareness and strengthens the memory, the soul is relieved of her earthly burden and thereby enjoys a higher freedom”, a wise man said long ago. Would the human being eat too much and too often, he would have no fertile thoughts to bring forth. Because if the digestive system claims a lot of energy, then no forces are accessible to apply to the thinking capability.
Source (German): Rudolf Steiner – GA 266a – Aus den Inhalten der esoterischen Stunden/Band 1 (page 559)
Translated by Nesta Carsten-Krüger