Character is not confined to the inner life of the soul, but penetrates into a man’s external physique and limbs. It finds expression, first, in his gestures; second, in his physiognomy; and third, in the plastic formation of the skull, the origin of what we call phrenology.
Source: Rudolf Steiner – GA 58 – Metamorphoses of the Soul / Paths of Experience – Volume One: LECTURE 5: Human Character – Munich, 14th March 1909
Translated by C. Davy and C. von Arnim