Iblis said. Should I bow to the one you created out of mud and clay. I am better than him. I was created out of fire. Is this the biggest sin that has ever happened and will ever happen until the end of time? I have heard with my own ears individuals that have insulted god all mighty with dirty words from the streets. Insulting god with dirty words appears to be a sin far uglier than saying to god that I am better than him and that's why I didn't prostrate to Adam. Not to mention that there are countless individuals that have participated in banning Islam with law during communist regimes and other regimes in the past. What influences most the size of the sin? The way and manner it is done? The content and effects of the sin? Or the properties of the heart?