Man has, as it were, become a kind of prosthetic God. When he puts on all his auxiliary organs, he is truly magnificent but those organs have not grown on him and they still give him much trouble at times. – Sigmund Freud
No one who has seen a baby sinking back satiated from the breast and falling asleep with flushed cheeks and a blissful smile can escape the reflection that this picture persists as a prototype of the expression of sexual satisfaction in later life. – Sigmund Freud