# He said to them

The word "them" here probably refers to the whole crowd of people. Alternate translation: "And Jesus said to the crowd"

# keep yourselves from all greedy desires

"guard yourself from every form of greed." Alternate translation: "do not allow yourself to love having things" or "do not let the urge to have more things control you"

# a person's life

This is a general statement of fact. It does not refer to any specific person. Some languages have a way of expressing that.

# the abundance of his possessions

"how many things he owns" or "how much wealth he has"