A person's actions speak the truth.
行为见人心

You're going to come across people in your life who will say all the right words at all the right times; but in the end, it's always their actions you should judge them by.
生活中有一些人总是说话很得体，但是最后你认清他还是通过他的行为。

So pay attention to what people do. Their actions will tell you everything you need to know.
因此要注意人们的行为。他们的行为会告诉你你需要知道的所有东西。