使用了不定冠词a修饰抽象名词kindness，将具体的善行具体化，强调个体的微小行为也能产生宏大影响，句式简洁有力。
It's just coffee—no one needs coffee, so this doesn't really matter, right? But what if you knew that a $2 cup of caffeine could change someone's day, week, or even their entire perspective? Boom: that cup of coffee just changed the world. Welcome to the Random Acts of Kindness movement, where wonderful things happen simply because kind people do them. You don't have to, and you don't necessarily need to, but you can—and it restores people's faith in humanity.
The best part? They pass it on.
这只是一杯咖啡——没人非喝咖啡不可，所以这没什么大不了的，对吧？但是如果你知道两美元的咖啡因可以改变一个人的一天、一周，甚至整个人生观呢？瞧：这杯咖啡刚刚改变了世界。欢迎加入“善意之举”运动，因为当善良的人开始行善，美好的事情就会发生。你不必非得这样做，但你完全可以这样做——它能让人重燃对人性的信心。
最棒的是，人们还会将这份善意传递下去。
"A simple gesture of yours might change someone's entire life."
"Even an inadvertent act of kindness can deeply touch someone."
"Be kind to yourself, for life is short; be kind to those around you, for you might not meet them in the next life."
"A smile costs nothing but brings warmth to others."
"If we can smile at others with a joyful heart, we will receive the same happiness in return."