Some of the Doctrines this study covers are:
DOCTRINE OF FRIENDSHIP
DOCTRINE OF LONELINESS
DOCTRINE OF DEMONISM & FALSE DOCTRINE
DOCTRINE OF HUMAN FREEDOM
DOCTRINE OF FEAR
DOCTRINE OF NEGATIVE VOLITION TOWARD DOCTRINE

INTRODUCTION
In this study we will take a look at some of the failures of David to show what kind of people God can use how can God take a man who has made as many mistakes as David and make him one of the greatest believers of all time.
Now David failed many times as a believer!

1) In 1 Sam. 21 (1-10) – David willfully sinned & told a lie. The result of his lie was that an entire city was wiped out (city of nob). David could have gotten very guilty & quit! But a quitter is not a man after God’s own heart. You may tell a lie & some people got hurt but David told a lie & a whole city was destroyed.
Now the average believer today would have never been able to handle this. The average believer would run around for the rest of his life with a guilt complex! But not David- he knew grace.
David got up!
He forgot about it & moved on!
God’s grace and God’s love was more real to him than his guilt. So instead he simply confessed his sin & kept moving forward.

2) David then "faked madness" became a phony. He made the enemy believe he was crazy & as a result hundreds died! 1 Sam. 2 (11-18) thousands were killed in battle because of Satan’s temptation of David.

3) Then David failed in responsibility in 2 Sam. 11-1. He should have led his troops in battle but he stayed home in Jerusalem & as a result there was disaster on the battlefield. There was also disaster on the home front of Jerusalem itself. Did he sit around & cry about it the rest of his life - no - he simply got up & moved on.

4) Then while he was in Jerusalem 2 Sam. 11 (2-27) - he ends up in certain "shocking" sins. We see that David committed adultery, he got a man drunk, he committed murder, he lied and committed other sins.
Now, at this point most believers would have stopped & quit - but not a believer after God’s own heart. Saul quit & eventually committed suicide! But David did not allow these overt sins to hinder him!

5) In 2 Sam. 6 (1-13) he did not honor the word of God! David enters into the sin of omission and he purposely disobeyed God’s command about the ark. He ignored the word of God & men were killed as a result. But he did not quit, he got up & went on.

6) In 1 Chron. 21 – David rejected the promises of God & questioned God. Joab his chief of staff warned him about this unbelief but he did it anyway. And yet even though 10,000 people died, David got up & kept moving.

7) And then of course we have his failure to forgive completely - with Absalom his son. Here's a man, David, who was oriented to grace better than almost anyone in life! But he failed to use grace in regard to one he loved dearly. This is often what happens - sometimes those whom we love the most we treat the worst. This is exactly what David did to his son Absalom. But David didn't let his sins & failures keep him down and this is what makes a believer – great. David always rebounded - no matter what. David forgot & moved on, he didn't cry about it. This is what made David a man after Gods own heart. David knew the doctrine & applied the doctrine when guilt came.

In essence, David believed Bible Doctrine.