人都以成念心却未成年
[rén dōu yĭ chéng niàn xīn què wèi chéng nián]
It translates as 'Though People Are Thinking of Things, Their Hearts Aren't Yet Mature'. This indicates contrast; while society expects maturation physically and psychologically, internally they still retain childish emotions, revealing immaturity despite outer grown-up image and responsibilities.