John's granddad told him 30 years ago that smoking cigars is cool. 

John now struggles with his health, but his deep core belief forces him to continue.

Has has no idea why he can't stop.

Beware of Dogma

Many guys are stuck in old ways of thinking. 

Same goes for relationships and marriage.

Someone told you that to be a good man, you must get married... or stay single, have kids, or don't have kids....

Then wife cheats on him, and he gets confused because he doesn't know whether he should stay or leave.

Think for yourself. You don't need anyone else to tell you how you should live. Take advice as ideas and direction, then choose for yourself. 

Some of the things you believe in are old ideas from thousands of years ago, and no one tells you that.

If you don't think for yourself, you look around and wonder why you can't figure things out. 

Many things have fundamentally changed, even since just 10 years ago.