David commits sin

¹⁰ David was told, “Uriah did not go home.” So he asked Uriah, “Haven’t you just come from a military campaign? Why didn’t you go home?”
¹¹ Uriah said to David, “The ark and Israel and Judah are staying in tents,^[a] and my commander Joab and my lord’s men are camped in the open country. How could I go to my house to eat and drink and make love to my wife? As surely as you live, I will not do such a thing!”
¹² Then David said to him, “Stay here one more day, and tomorrow I will send you back.” So Uriah remained in Jerusalem that day and the next. ¹³ At David’s invitation, he ate and drank with him, and David made him drunk. But in the evening Uriah went out to sleep on his mat among his master’s servants; he did not go home.
¹⁴ In the morning David wrote a letter to Joab and sent it with Uriah. ¹⁵ In it he wrote, “Put Uriah out in front where the fighting is fiercest. Then withdraw from him so he will be struck down and die.”
¹⁶ So while Joab had the city under siege, he put Uriah at a place where he knew the strongest defenders were. ¹⁷ When the men of the city came out and fought against Joab, some of the men in David’s army fell; moreover, Uriah the Hittite died.
¹⁸ Joab sent David a full account of the battle. ¹⁹ He instructed the messenger: “When you have finished giving the king this account of the battle, ²⁰ the king’s anger may flare up, and he may ask you, ‘Why did you get so close to the city to fight? Didn’t you know they would shoot arrows from the wall? ²¹ Who killed Abimelek son of Jerub-Besheth^[b]? Didn’t a woman drop an upper millstone on him from the wall, so that he died in Thebez? Why did you get so close to the wall?’ If he asks you this, then say to him, ‘Moreover, your servant Uriah the Hittite is dead.’”

David sinned because of several reasons. First and foremost, why was he not with his men and generals? God had called him to be out fighting with his men. But why is he not fighting? Right thing done at right time will yield a good result but a wrong thing done at a wrong time will yield a terrible result. However, a right thing done at a wrong time will give equally bad results. And that was what happened to David. David was a man of God. A man after God's own heart! But now we witness him doing such terrible things. He plotted against his general Uriah. He wanted Uriah to sleep with his wife so to "cover" for his wrongdoing. He wanted Uriah to think of David's son as Uriah's own son. That was so bad. But Uriah was firm and Godly. He thought of his men. He thought of the people who did not rest and was working so hard to fight for Israel and he decided that he cannot rest. He is unfit to rest. Not giving up, David went further and plot to kill him. And Uriah died.  What i learnt here is to really do the right thing at the right time only. No other alternative. If i allowed myself to have the right thing happen at the wrong time, this might just have happened. Great powerful man of God can be tempted by this, what more us?