I believe gambling to be morally wrong. The end justifies the means. What is true is what is true for you. I am strict about what movies or TV programs my children watch. I believe that in most cases it is OK for me to watch R-rated movies.
People are basically good, though flawed, with a tendency to sin.
Justification is a process by which we are made acceptable to God. I have a strong preference on what kind of worship music is correct in a worship service. This is obviously a delusion.