Success in business starts with integrity—without it, even the best strategies will fail.

I can never be safe; I always try and go against the grain. As soon as I accomplish one thing, I just set a higher goal. That's how I've gotten to where I am.

怀疑只能由行动来回答。

真理是不朽的，它超越了时间的局限。

心理学的方法必须像自然科学一样精确。