Hi,
The living always think that gold can make them happy.
'The living' means 'all living people'. The meaning is that everybody thinks that money will make them happy.
Hanuman, I'd like to tell you a little about politeness in Western culture. It's a very important thing, but there are levels of politeness. Sometimes a person can be not polite enough, sometimes they can be too polite. When you say 'Hello Sir', it's a little too polite by Western standards. It's better just to say 'Hi' or 'Hello'. We don't say 'Sir' to each other a lot. I hope you don't mind my mentioning this to you.
Best wishes, Clive