曾经我们都太过于天真现在我们都太过于现实
[céng jīng wŏ men dōu tài guò yú tiān zhēn xiàn zài wŏ men dōu tài guò yú xiàn shí]
Once we were too naive, now we're too realistic: Reflects an individual's change from being innocent to pragmatic, likely due to experiences gained throughout life.