It's a good question Chester. There are at least 2 passages that somewhat deal with this question. In both passages we ALL at least walked liked the sons of disobedience who have the spirit of the prince of the power of the air. So it might be fair to say that if we were not literally children of the devil, we at least acted in a way that was indistinguishable from them.
Ephesians 2:2 And you
He made alive, who were dead in trespasses and sins, 2 in which you once walked according to the [
a]course of this world, according to the prince of the power of the air, the spirit who now works in the sons of disobedience, 3 among whom also we all once conducted ourselves in the lusts of our flesh, fulfilling the desires of the flesh and of the mind, and were by nature children of wrath, just as the others.
Collosians 3:6 Because of these things the wrath of God is coming upon the sons of disobedience, 7 in which you yourselves once walked when you lived in them.
So I was DEAD in my sins. Dead means NOT alive. Spiritually speaking I was dead. A dead person cannot do ANYTHING but be dead. There is no logical explanation as to why the desire came on me to even entertain the Gospel, much less believe and accept it. My life consisted of parties, and when the next one would come and most of the lists of bad, sinful stuff listed in several places. Why would I WANT to give that up?
Now my dead FLESH tries to come back to life ALL the time. And unfortunately I still sometimes forget that it IS dead and succumb to it and sin. This happens because of a failure to walk every moment in the Spirit. Because those are our only 2 options. Every second, of every day, we either walk in the Spirit or walk in the flesh.
To directly answer your question, whether a child of the devil, or just plain dead doesn't matter. What matters is that God drew me to Him. As I look back i can see exactly how He did that, and how He kept me physically alive, although I should have died several times over, UNTIL I was made His Child. I do not have an exact date of when that occurred, but I believe it was in 1992.