Do you see the difference?

Then David went over to the other side and stood far off on the top of the hill, with a great space between them. And David called to the army, and to Abner the son of Ner, saying, “Will you not answer, Abner?” Then Abner answered, “Who are you who calls to the king?” And David said to Abner, “Are you not a man? Who is like you in Israel? Why then have you not kept watch over your lord the king? For one of the people came in to destroy the king your lord. This thing that you have done is not good. As the LORD lives, you deserve to die, because you have not kept watch over your lord, the LORD's anointed. And now see where the king's spear is and the jar of water that was at his head.”
Saul recognized David's voice and said, “Is this your voice, my son David?” And David said, “It is my voice, my lord, O king.” And he said, “Why does my lord pursue after his servant? For what have I done? What evil is on my hands? Now therefore let my lord the king hear the words of his servant. If it is the LORD who has stirred you up against me, may he accept an offering, but if it is men, may they be cursed before the LORD, for they have driven me out this day that I should have no share in the heritage of the LORD, saying, ‘Go, serve other gods.’ Now therefore, let not my blood fall to the earth away from the presence of the LORD, for the king of Israel has come out to seek a single flea like one who hunts a partridge in the mountains.”
Then Saul said, “I have sinned. Return, my son David, for I will no more do you harm, because my life was precious in your eyes this day. Behold, I have acted foolishly, and have made a great mistake.” And David answered and said, “Here is the spear, O king! Let one of the young men come over and take it. The LORD rewards every man for his righteousness and his faithfulness, for the LORD gave you into my hand today, and I would not put out my hand against the LORD's anointed. Behold, as your life was precious this day in my sight, so may my life be precious in the sight of the LORD, and may he deliver me out of all tribulation.” Then Saul said to David, “Blessed be you, my son David! You will do many things and will succeed in them.” So David went his way, and Saul returned to his place. (1 Samuel 26:13-25 ESV)
David and Saul had previously had a similar encounter when David was hiding in the cave.  David could have ended it there once and for all, but refused to kill Saul.  That event ended with Saul making false promises and going away, then David going back into a safe place.  But so many things are different here: David comes out after Saul, and in his words implies that he is open to God's judgment, but in fact, God has already judged their actions and intentions, as demonstrated by what had just happened. This time, it is David who had turned and walked away first. What is the big difference? David has overcome his fear.  That is what we have seen in the Psalms David wrote while in hiding: "What time I am afraid, I will trust in You." We see that taking full fruit here, when he takes the initiative in coming, acting, and walking away. His faith in God's faithfulness has overcome his fear.  Have you made any progress on your fears?