The sinful nature deriving from Gnosticism
Sin is what separates us from God and that is because of the choice on our part to break his law. Being conceived or born are certainly not offensive to God so such things could not possibly be a cause for separation from God. Children are not born in sin!
There is no “sinful nature” in sight when reading the Bible. We are “wonderfully made” according to the Bible, and created in God’s image. A sinful nature would provide us with an excellent excuse for our sin (“my sinful nature made me do it ...”) but in reality we have no excuse for breaking the commandment of God since we are made fully capable of being faithful to God.
1 John 3::4 Whosoever committeth sin transgresseth also the law: for SIN IS THE TRANSGRESSION OF THE LAW.
Is. 59:2 But YOUR INIQUITIES have separated between you and your God, and your sins have hid his face from you, that he will not hear.
Micah 3:4 Then shall they cry unto the LORD, but he will not hear them: he will even hide his face from them at that time, as they have behaved themselves ill in their doings.
Jas 4:17 Therefore to him that KNOWETH to do good, and doeth it not, to him it is sin.
Jas. 1:14 But every man is tempted, when he is drawn away of HIS OWN LUST, and enticed. 15 Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
The fall of Adam has certainly affected all of us since we cannot reach the tree of life due to him, but never due to having inherited his or anyone else’s sin. Adam was the first to sin (along with Eve) so it is a good description to say that sin entered into the world through him, but note that it is DEATH (not “sin”) that passed upon all men, and note also the reason for this: “FOR that all have sinned”. Not because Adam sinned and we inherited his transgression through the genes.
Romans 5:12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned
Again, the Bible never claims that a conception or birth separate us from God. Coming into this world is hardly something we can plan ourselves and it is never considered offensive to God. Augustine made the sinful nature idea popular in church and Luther and Calvin continued to spread this gnostic idea.
Jesus was tempted like all of us but without sin (he successfully stood against sin) and the Bible does not claim that he had an advantage over us in any way. If we were all born with a sinful nature (which makes us sin) and not Jesus, this would be a HUGE advantage.
Who is righteous? Do not let anyone deceive you about this.
1 John 3:7 Little children, let no man deceive you: he that DOETH righteousness is righteous, even as he is righteous.