我最喜欢的生活中的事情不花钱。很明显，我们所有人最宝贵的资源是时间。

解释：乌鸦聚集在一起，虽然看上去很和好，实际上并不亲密；不慎重地结交朋友，虽似牢固，终必破裂。

The growing good of the world is partly dependent on unhistoric acts; and that things are not so ill with you and me as they might have been, is half owing to the number who lived faithfully a hidden life, and rest in unvisited tombs. ― George Eliot, Middlemarch

老脑筋就像老马；如果你想保持它们的工作状态，就必须锻炼它们。

希望是一个卷起袖子的动词。