Ride the razor's edge

[Bushwhacker]

Please, may someone say to me the meaning of "He rode the razor's edge"?
Does it mean that someone is walking through a dangerous path, or the like?

Thanks a lot for kind attention.

[Anglika]

Probably, but can you give more context?

[Bushwhacker]

I'm glad to add some context to my question. The paragraph where I found this expression is said by Kevin Costner who is talking on the script for a recent movie in which he plays the tittle rol: "Mrs Brooks", a sophisticated serial killer. He says: "I was taken aback by how good the writing was and what an interesting window it gave into a serial killer's life... it provided a really intriguing view into a despicable man's inner mind. It really rode the razor's edge."

Thank You for your kind attention.

[Bushwhacker]

Originally Posted by Anglika

Probably, but can you give more context?

I'm glad to add some context to my question. The paragraph where I found this expression is said by Kevin Costner who is talking on the script for a recent movie in which he plays the tittle rol: "Mrs Brooks", a sophisticated serial killer. He says: "I was taken aback by how good the writing was and what an interesting window it gave into a serial killer's life... it provided a really intriguing view into a despicable man's inner mind. It really rode the razor's edge."

Thank You for your kind attention.

[Anglika]

There is an idiom "on a knife edge" = you have a very narrow path to follow. This takes it one step further as razors are generally much sharper and thinner than knives. The path is so narrow that you may well fall off - and in this context become insane.