If one's life condition is in the world of hunger, one can destroy oneself. Some of the examples that our Chief Priest cited are / were gambling, alcoholism, sexual misconduct and drug addiction.
Which verb in bold should I use? I think 'are' because according to our religion, gambling, alcoholism, sexual misconduct and drug addiction are some of the causes of a life of misery and other negative things.
If you start with "Some of ..." then continue with "are". Saying "some of" means that you will be stating more than one example. If you started with "One of ..." then you would continue with "is".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.