A personal walk with God comes to us through wisdom and revelation. You will soon discover that we need both.
For a moment the King's grief and anger were so great that he could not speak. Then he said: "Come, friends. We must go up the river and find the villains who have done this, with all the speed we may. I will not leave one of them alive." "Sire, with a good will," said Jewel. But Roonwit said, "Sire, be wary in your just wrath. There are strange doings on foot. If there should be rebels in arms further up the valley, we three are too few to meet them. If it would please you to wait while..." "I will not wait the tenth part of a second," said the King. "But while Jewel and I go forward, do you gallop as hard as you may to Cair Paravel ... we must go on and take the adventure that comes to us." "It is the only thing left for us to do, Sire," said the Unicorn. He did not see at the moment how foolish it was for two of them to go on alone; nor did the King. They were too angry to think clearly. But much evil came of their rashness in the end. (C. S. Lewis, The Last Battle)
King Tirian of Narnia has a good heart. But he also has an unwise heart—an untrained heart. I'd say that's true for most of us. Our heart has been made good by the work of Christ, but we haven't learned how to live from it. Young and naive it remains. It's as though we've been handed a golden harp or a shining sword. Even the most gifted musician still has to take lessons; even the bravest of warriors must be trained. We are unfamiliar, unpracticed with the ways of the heart. This is actually a very dangerous part of the journey. Launching out with an untrained heart can bring much hurt and ruin, and afterward we will be shamed back into the gospel of Sin Management, having concluded that our heart is bad. It isn't bad; it's just young and unwise.