The truth is that life is delicious, horrible, charming, frightful, sweet, bitter, and that is everything.
真相是，生活既美妙又可怕，既迷人又恐怖，既甜蜜又苦涩，这就是一切。
Psychological truth is found in practical experience.
Randomized evaluations can help us understand what works and what doesn't in development.
"The only way to get rid of a temptation is to yield to it."
一个组织的原则质量决定了其行动的质量。