Profitability and sustainability are not mutually exclusive—they must go hand in hand.

男孩和他的心已经成为了朋友，彼此都无法背叛对方

I wanted to discover myself, the reason I was born, and the meaning of life.

解析：比喻立志用功需要循序渐进。

我不太在乎别人怎么说我，我只做自己想做的事。