Psychology must be a science of facts, not theories.

It’s thrilling to be extremely polite to rude strangers.

解析：善恶由心生，非由外物定。

Language is not a cultural artifact that we learn the way we learn to tell time or how the federal government works. Instead, it is a distinct piece of the biological makeup of our brains.

Short-term debt can be dangerous because it creates the possibility of sudden runs.