Quiet people have the loudest minds.
不过是君主不把它[爱人利人]用在政事上,士大夫也不把它付诸行动罢了。
人的感情容易变化反复,人生之路常会崎岖不平。
The brain caps off its second and last growth spurt in your 20s as it rewires itself for adulthood.