A good abstraction is one that captures the essential aspects of a concept while ignoring the irrelevant details.
The only person you are destined to become is the person you decide to be.
Truth is not spoken in anger. Truth is spoken, if it ever comes to be spoken, in love.
南怀瑾：世间法不空，与般若有挂碍，等于眼中有沙，认生死轮回为实有；出世间法不空，与般若亦有挂碍，等于肉中有刺，认化城为宝所；故有凡夫生死、二乘涅盘的颠倒梦想。
出自汉·桓宽《盐铁论·忧边》。因，根据。知，通“智”。明智的人根据时机而改变行动方案，智慧的人随着事情的发展而制定不同的应对策略。这句话言随机应变、因事制宜才是明智者。明智的人，因时间的推移而进行改革；聪慧的人，依世情而制定治国方法。