Psalms 51:3-5 For I am aware of my rebellious acts; I am forever conscious of my sin.
Against you – you above all – I have sinned; I have done what is evil in your sight. So you are just when you confront me; you are right when you condemn me.
Look, I was guilty of sin from birth, a sinner the moment my mother conceived me.
...and the context is David, not his mother.
The NIV is a biased translation translated in accordance with the doctrine of Original Sin.
The NIV Committee on Bible Translation were predominantly Calvinists.
NIV Translators and Editors
Thus the NIV is full of interpretive bias in accordance with Calvinistic doctrine.
A good example is with the translation of the Greek word "sarx" which simply means "flesh." Yet the NIV Committee rendered it as "sinful nature" in a few places in order to create proof texts for their doctrine. The translators manipulated the data to fit their preconceived notions.
Psalm 51:5 says this...
(KJV) Psa 51:5 Behold, I was shapen in iniquity; and in sin did my mother conceive me.
The context is David speaking of being born and raised in a world full of sin. Of course if one insists on using the NIV they can claim that David is teaching that he was born a sinner, yet why didn't the Jews teach that? Why didn't the early church teach that? Why is it that Original Sin was only accepted as orthodox in the fourth century due to the influence of Augustine? Do people ever consider that?
Now go take a look at all the different translations at the following link and go look up where each one comes from...
https://www.biblegateway.com/verse/en/Psalm%2051:5
You'll see that all NIV like translations all have a common source within the framework of a common theological paradigm.
New International Version - Wikipedia, the free encyclopedia
It is all very interesting to dig into.
Yet it is not really necessary because God gave us human reason and the words of Jesus. We don't need theological degrees or be verses in the history of literature to understand these things. All we need is an honest heart.
Jesus did not teach inability. Jesus did not teach birth depravity. Jesus taught that sin was rooted in a defiled heart and compelled people to cleanse their hearts. If human beings were born naturally depraved and were disabled from being able to obey God then Jesus would not have taught the things He taught.
Jesus gave us an example to follow and commanded us to follow it. Jesus never implied that people couldn't in the context of human inability. He implied people wouldn't because they would refuse to repent and forsake their evil and thus would remain blind to the truth.
Think about it.
Jesus
did teach about heart purity in Matthew 5. He plainly stated that it is the pure in heart who will see God. Jesus said that. Jesus then went on to teach that just because one does not outwardly commit adultery or murder that it does not necessarily mean they are righteous, He taught that if we lust in our heart or hate our brother then we have committed adultery and murder in the heart.
Jesus stated that our righteousness must exceed that of the scribes and Pharisees in this context. At the end of that chapter He urges people to be perfect as God is perfect and the meaning of that word in the Greek related to "moral perfection." Moral perfection is the result of a pure or clean heart.
In Matthew 5 Jesus spoke of cutting off the offending hand or plucking out the offending eye as an illustration of taking sin seriously by cutting off that which leads us into sin (very similar to Paul's notion of crucifying the flesh).
How is it then that a theology can teach the opposite of what Jesus taught and be the truth? How can that be?
How is it that one can claim to believe in Jesus and claim to be a child of God and yet claim that they are inwardly wicked and cannot obey God? To do that is to deny what Jesus taught.
Mat 6:22 The light of the body is the eye:
if therefore thine eye be single, thy whole body shall be full of light.
Mat 6:23 But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!
It is through faith that our minds eye may be single, whereby our whole body shall be full of light. Light that we can let shine atop a hill for all the world to see as we walk blameless and righteous in a crooked and perverse generation.
It is in deception that one can have a light in them which is actually darkness and that kind of darkness is great indeed. False religion is rooted in light which is actually darkness and we must all be very diligent in seeking God with an honest heart in order to avoid the deceptions of this world.
Seriously take pause and really think about it.