Disobedience is a spirit.
Ephesians 2:2
Wherein in time past
ye walked according to the course of this world,
according to the prince of the power of the air, the spirit that now worketh in the children
of disobedience:
That "spirit" is wicked. It is described in great detail in the scriptures, such as in the above, the prince of the power of the air.
Where else do we see the "AIR" played out in scripture? Why, right here:
Mark 4:
3 Hearken; Behold, there went out a sower to sow:
4 And it came to pass, as he sowed, some fell by the way side, and
the fowls of the air came and devoured it up.
What does this MEAN?
Jesus tells us exactly what it means, here:
Mark 4:
14 The sower soweth the word.
15 And these are they by the way side,
where the word is sown; but when they have heard,
Satan cometh immediately, and taketh away the word that was sown
in their hearts.
Yes, fowls of the air indeed.
Where else do we see these fowls, the spirit of disobedience?
Revelation 18:2
And he cried mightily with a strong voice, saying,
Babylon the great is fallen, is fallen, and is become
the habitation of devils, and the hold of
every foul spirit, and a cage of
every unclean and hateful bird.
Paul takes off quite nicely on this subject from the above, to here, which I might add is basically IDENTICAL to what Jesus said in Mark 4:15:
Romans 7:
7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.
Yes, in him was the spirit of disobedience, shown in this way. And he concludes from this, this fact, this LAW that NONE of us avoid either:
Romans 7:
21 I find then a law, that, when I would do good, evil is present with me.
It is good to remember that we do have spiritually adverse predators when following the bread of LIFE.
The LAW that Paul derived above helps keep these things in mind.
Do believers have an evil conscience?
Hebrews 10:22
Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.
There is no need for "sprinkling" if this wasn't so. Only a TRUE heart can perceive this matter. Only a lying heart would say otherwise.