Recently i was listening to a sermon, and something the speaker said blew my mind(in a good way) he said "all unbelievers do is sin" as in everything they do, even things that we would say are morally good are sin such as building a hospital. which is clearly a good thing, but is argued by this preacher, and me is sin. because as Romans 14:23 says
anything that does not proceed from faith is sin.
So if anything that doesn't come from faith is sin, and we take the word anything or some translations say whatever means everything, then yes everything they do is sin. which is unbelievably hard for most to accept because they have this itching inclination that there is somehow some good in us, but there is not (apart from Christ of course). so as mentioned before what if an unbeliever builds a hospital? is that sin? yes.
if i asked my father if i could take the car to the ball game and he says "sure son, just wash it so it will be clean tomorrow, and you can take it" and this makes me angry because it was not in my plans to wash the car before i go to the ball game, and i leave the room just fuming mad at my father. and he says "i'm sorry son, that's the prerequisite for taking the car, so if you wash it you can take it" well an hour or two later despite my best efforts to revolt, my father could look out the window and see me washing the car. now i am obeying my fathers will, but my heart in the matter is desperately against him, all i have within me wants to not be doing what it is i am doing for my father.
so, yes i am obeying my fathers will, but my heart in the action is selfish to the core and rotten and against my ultimately against my father, because what i am doing is not out of my love for him, but my own selfish gain.
that is the way unbelievers build hospitals.
they are ultimately doing the will of the father, but have hearts that are desperately against him in so doing. therefore sin is produced, because the building of that hospital or any other morally good thing is not from faith, so it cannot be out of a love for the father, so it is sin.
here is to amazing biblical preaching. thank you John Piper.