Breastfeeding is a key issue found in ancient sources that resonates with public debates today, affecting women in different parts of the world and of all social classes. The aim of this research was to identify breastfeeding narratives in ancient medical and philosophical texts from the 1st to the 6th century CE that address ethical issues in the medical management and social perception of new mothers. We examined 15 literary sources and one funerary inscription on lactation and critically evaluated the ancient idea of the perfect breastfeeding mother versus the non-breastfeeding mother. We then discussed our historical data in terms of objectivity and significance in relation to contemporary attitudes towards motherhood and lactation, e.g., (1) the cult of the perfect, breastfeeding mother in contemporary lactation education and (2) the onset of conditions which may affect normal breastfeeding, such as dysphoric milk ejection reflex (D-MER), breastfeeding aversion response (BAR) or post-partum depression. The analysis of the results showed that in both ancient and contemporary postnatal health care: (1) good mothering is associated with breastfeeding and (2) alternative feeding methods are acknowledged, but never as the best, natural option. Finally, our analysis shows that public health policies on breastfeeding and mothers’ own knowledge of their bodies are contested between nursing theories, social expectations and economic factors.