
The simple definition of sin is to miss the mark. The law gives us God's standard of perfection, it establishes the mark that we are to aim for, and Jas. 2:10 says to keep the whole law (which consists of six hundred thirteen separate commandments) yet to offend on one point, is to be guilty of all. Other than Jesus, no man could keep the law perfectly because all of us humans have a sin nature dwelling in us.There is one major difference between Jesus and all other humans, and that is the identity of our fathers. All of mankind has inherited a sin nature from our father Adam, but Jesus' father was God. Until the advent of DNA testing, when it is necessary to establish the paternity of a child, the doctors did not check fingerprints or skin, hair or eye color, they checked blood type. Why? Because the blood of a pregnant woman never comes in contact with the blood of her unborn baby. While a woman's body produces eggs every month, those eggs never develop into a baby, or are made alive, unless they are fertilized by the father's sperm. Lev. 17:10 states that the life of the flesh is in the blood. So the egg is not made alive until it is fertilized by the sperm, which in turn produces the blood which makes the fertilized egg (baby) alive.The blood type, then, of the developing unborn child is determined by the father.All of mankind has inherited our blood from our father Adam (Acts 17:26) but Jesus received his blood from his Father, which was God. Therefore the sin nature which all humans (including Paul - Rom. 7:15-25) struggle with is contained in our blood. In order for us to become heavenly creatures, fit to live in God's perfect, holy heaven, that sin nature, which is in our blood, will need to be destroyed.This will happen at the rapture. I Cor. 15:50 states, "Now this I say, brethren, that flesh and BLOOD cannot inherit the kingdom of God; neither doth corruption inherit incorruption. " I John 3:2-3 says, "Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is. And every man that hath this hope in him purifieth himself, even as he is pure." We do know some things about Jesus' resurrection body, particularly that it does not have any blood in it. He shed his blood on the cross, and in Luke 24:39 he said, "…handle me, and see; for a spirit hath not flesh and bones, as ye see me have." We see here a reference to flesh and bone as opposed to the flesh and blood mentioned in I Cor. 15:50.
All living humans have a sin nature dwelling in our blood, Christians are sealed in our hearts with the Holy Spirit which counteracts but does not override this sin nature, and we are only sealed with the Holy Spirit until the redemption of the purchased possession (the body of Christ) which will happen at the resurrection/ rapture (Eph. 4:30). This sin nature will have to be destroyed at the resurrection: like Jesus, our resurrection bodies will not have blood in them. I personally believe the blood will be removed by fire: fire represents judgment and fire consumes. Will it hurt? Probably about as much as having a particularly annoying splinter pulled out of your finger!...