Don't Trust Anyone - Not Even Yourself

People are so deceptive that having a lie detector wouldn't not guarantee that you wouldn't get lied to. Here's an example.

No more Mr. Nice Guy

"Men are more ready to repay an injury than a benefit, because gratitude is a burden and revenge a pleasure" -Tacitus

It is good to be good, nice and to say the truth. However, being good, nice and truthful all the time is foolish.

Nice people are taken advantage of all the time. Hence the expression, "Nice guys finish last." I know this from personal experience.

A child who speaks the truth all the time attracts bullies like shit attract flies. For truthful adults, their friends would avoid them like a deadly plague because they can't be trusted with secrets.