人生中最伟大的事情就是保持心态年轻。
The greatest thing in life is to keep your mind young.
所有尘世的存在最终都必须被包含在一本书中。
解析：经常反省检查自己，不给私欲留空间。
Love covers a multitude of sins.
人生之初，即有忧愁，与生俱来也。
The most credible empirical research often comes from studies that have a clear and transparent design, where the assumptions are laid out for everyone to see.