“In a world of common interests, betrayal behind one's back is one of the most frequent behaviors of false friends, colleagues and relatives.”

“Few friendships would survive if each one knew what his friend says of him behind his back”

“One loyal friend is worth ten thousand relatives.”

“In the United States businessmen often do not trust their colleagues. If you trust your colleague today, he may be your competitor tomorrow, because people frequently move from one company to another.”

“If you can't be honest with your friends and colleagues and loved ones, then what is life all about?”

“Relatives, colleagues, friends, and marriage partners, understandably threatened by these changes, often exert pressure on the individual...These pressures only widen the gap. You don't stop an immigrant by trying to revive his hopes for the Old World.”

“The difference between false memories and true ones is the same as for jewels: it is always the false ones that look the most real, the most brilliant.”

“At some point I believe one has to stop holding back for fear of alienating some imaginary reader or real relative or friend, and come out with personal truth.”

“Most effects in psychology are relatively unimportant. That is, most variables, considered in isolation, have relatively little impact on behavior. This doesn't mean… that we should all abandon psychology and become plumbers instead. The small magnitude of most effects in psychology is itself a discovery of psychology. One might argue, in fact, that it is one of the great metadiscoveries of the field. Most variables have little impact, and thus most of the phenomena studied by psychologists are products of a multiplicity of variables.”

“The one thing worse than an enemy is a friend turned false.”