“Sin lies only in hurting others unnecessarily. All other "sins" are invented nonsense.”
“Sin lies only in hurting other people unnecessarily. All other "sins" are invented nonsense. (Hurting yourself is not sinful -- just stupid.)”
Source: Time Enough for Love
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes
"Christ The Redeemer" in A Body of Divinity http://www.fivesolas.com/watson/redeemer.htm (1692).
Source: Life Together: The Classic Exploration of Christian Community
                                        
                                        Book II, ch. 3 (trans. Constance Garnett)
The Elder Zossima, speaking to a devout widow afraid of death 
The Brothers Karamazov (1879–1880) 
Context: If you are penitent, you love. And if you love you are of God. All things are atoned for, all things are saved by love. If I, a sinner even as you are, am tender with you and have pity on you, how much more will God have pity upon you. Love is such a priceless treasure that you can redeem the whole world by it, and cleanse not only your own sins but the sins of others.
                                    
“There is no sin except stupidity.”
Source: The Critic as Artist (1891), Part II
                                
                                    “All other sins are open,
Usura alone not understood.”
                                
                                
                                
                                
                            
                                        
                                        Addendum for C 
Drafts and Fragments of Cantos CX-CXVII
                                    
“What harms no other is not sin.”
                                        
                                        A saying in  Cuzeian theism http://www.zompist.com/cuzeian.htm#Responsibility 
Fictional sayings