When you are focusing upon what you want, your Inner Being offers you positive emotion. When you are focusing upon what you need, your Inner Being offers you negative emotion because you are not focused upon what you want. You are focused upon the lack of what you want - and your Inner Being knows that that which you give thought to is that which you attract. Your Inner Being knows that you do not want the lack; your Inner Being knows you want what you want, and your Inner Being is offering you guidance so that you will know the difference.
Focusing upon a solution makes you feel positive emotion. Focusing upon a problem makes you feel negative emotion, and while the differences are subtle, they are very important, for when you are feeling positive emotion, you are attracting into your experience that which you want. When you are feeling negative emotion, you are attracting into your experience that which you do not want.