Evil is knowing better, but willingly doing worse.

The Stanford prison experiment came out of class exercises in which I encouraged students to understand the dynamics of prison life.

There are no limits to what I would do to make my classes exciting, interesting, unpredictable.

If you put good apples into a bad situation, you’ll get bad apples.

After doing psychology for half a century, my passion for all of it is greater than ever.

Being hurt personally triggered a curiosity about how such beliefs are formed.

What troubles me is the Internet and the electronic technology revolution. Shyness is fueled in part by so many people spending huge amounts of time alone, isolated on e-mail, in chat rooms, which reduces their face-to-face contact with other people.