Situational variables can exert powerful influences over human behavior, more so that we recognize or acknowledge.

Time perspective is one of the most powerful influences on all of human behavior. We're trying to show how people become biased to being exclusively past-, present- or future-oriented.

Human behavior is incredibly pliable, plastic.

That human behavior is more influenced by things outside of us than inside. The 'situation' is the external environment. The inner environment is genes, moral history, religious training.

It's not what happens to us, but our response to what happens to us that hurts us.

The crime of suicide lies rather in its disregard for the feelings of those whom we leave behind.