You can tell a good piece of fruit or vegetable by its color and by its feel. The avocado might be the trickiest one I know. A novice might think that a bright green, hard avocado is the best, but counter-intuitively, the best avocados are dark, with shades of brown, giving easily to the touch. The heart of a growing Christian also gives easily to the touch.
No one comes to see a counselor or pastor to talk about their problems not wanting success, but the state of our hearts so often resists the very thing we want. A soft heart can turn my mediocre counsel into pearls of wisdom. A hard heart will turn the wisest counsel ever offered into sawdust.