all bread is not baked in one oven; men’s hearts(/minds) differ just as their faces do
❍ 人心之不同，如其面焉。(《左传·襄三十一年》) Men’s minds are different just as their faces are.
人心如面rén xīn rú miàn
人的思想就像人的面貌一样各不相同。the thoughts of people are different just like his face, all bread is not baked in one over