I have heard it said that simply being with a negative or challenging emotion just creates more of it because what you give attention to you create more of (as the law of attraction teaches).
This is actually a misunderstanding of the dynamics that take place. When you deeply feel emotions and sensations from awareness, allow them, surrender to them, say yes to them as awareness, what you create more of in your life is not the reflection of that "negative" emotional state but a reflection of the yes. The yes to life, the yes to what is. And life will reflect more of that flow. By feeling fully you actually vibrationally free yourself, not bind yourself to these emotions and states. But it has to be unconditional, not seeking to get anything out of it. Not seeking to get anywhere.