"One of the strange things about human beings is that they value only that which has a price."?

I believe Napolean Hill statement is true until a person becomes wise enough to understand EVERYTHING has a price. It just may not be monetary.

True to some but that depends on our concept of value. It may not cost anything but it may be more valuable than tho cost much more ...

That has happened in my country and it has made our citizen's life has full of lier and bad for our children in their future.

In many cases it is true. If you offere something of value for free, people do not believe that it is valuable, because it does not cost anything. If you pay for something, even if it is little money, it seems to ve more valuable.

"Most people seek after what they do not possess and are enslaved by the very things they want to acquire." (Anwar El-Sadat) ... but I want to believe the Napoleon Hill quote in the question is NOT true in general - eg. what is the price of your life or your loved ones' life? :-o

Not ALL human beings...