Is there a picture there for us in Leviticus 4?

Leviticus 4:22 When a ruler hath sinned, and done somewhat through ignorance against any of the commandments of the LORD his God concerning things which should not be done, and is guilty;
 23 Or if his sin, wherein he hath sinned, come to his knowledge; he shall bring his offering, a kid of the goats, a male without blemish:
 26 And he shall burn all his fat upon the altar, as the fat of the sacrifice of peace offerings: and the priest shall make an atonement for him as concerning his sin, and it shall be forgiven him.

Was this not similar to when David sinned against the LORD in having Uriah killed, after he slept with his wife?
After the child was born, the LORD sent Nathan the prophet to David.
When Nathan said, "Thou art the man", David immediately confessed.
Then Nathan told David that the LORD had put away his sin.
According to the words before Psalm 51, David wrote that psalm when Nathan came to him.
So what was going on for those 9 months or so?
David as king had been making his own hand copies of the scriptures, according to Deuteronomy 17:15,18,19
He knew the Bible, and he also was used to write scripture by inspiration of God.
He also was called a man after God's own heart.
How come it wasn't until Nathan came, that David truly realized how greatly he had sinned?
Is it not like with us, when we sin?
But when the Holy Ghost convicts us, then we truly realize what we have done.
Isn't that when we confess and repent?
So that period of time from when we sin until the Holy Ghost convicts us, are we somewhat in ignorance?
I know that Hebrews 10:26 mentions "sin wilfully", but is there any spiritually induced ignorance involved?
The priests & leaders knew full well that they were getting the people to call on Pilate to have Jesus crucified.
The also said to have his blood to be upon them, Matthew 27:2.
Yet, on the cross:

Luke 23:34 Then said Jesus, Father, forgive them; for they know not what they do. And they parted his raiment, and cast lots.

Also, Paul mentioned that Eve was deceived.
So can the devil deceive us, and even blind us to what is really happening?
He does it to the lost, so that they won't get saved:

II Corinthians 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.

Can he also blind us?
Was not that what happened to the Galatians & Laodiceans?

Galatians 3:1 O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you?

Revelation 3:17 Because thou sayest, I am rich, and increased with goods, and have need of nothing; and knowest not that thou art wretched, and miserable, and poor, and blind, and naked:

Jesus said that the Laodiceans were blind, and were counseled to anoint their eyes with eyesalve that they may see.
So is it possible, that when the devil comes to tempt us to sin, he can somehow blind us, so that we are somewhat ignorant, yet still guilty?
Then, when the Holy Ghost convicts us, our eyes are opened and we really see what we truly have done.
Then he grants us repentance and godly sorrow, we acknowledge and confess our sin, and repent.
Was this the picture painted in Leviticus?
There are other cases in Leviticus talking about sinning in ignorance.
However, they had to bring a sacrifice, but we after the cross, now depend upon the one sacrifice of the Lamb if God.