The authentic religion teaches you to discover your immortality, to discover the god within you.
Discover yourself, otherwise you have to depend on other people's opinions who don't know themselves.
I am less interested in your chain-smoking; I am more interested in your habit. Any habit that becomes a force, a dominating force over you, is a sin. One should live more in freedom. One should be able to do things not according to habits but according to the situations.