It's ok to feel sad, happy, angry, disappointed,etc. It's ok to feel. Feeling something doesn't mean it changes the overall state of being. It's a feeling/emotion that will pass. ex: you can be happy, overall in your life and still feel sad (like when you lose a loved one). I think it's a case of, a state of mind vs the emotion you're feeling in that present moment. And I don't even think we need to label it as "good or bad".

So, as long as your state of mind is happy, joyful, fulfilled. The roller coaster of emotions we will feel throughout lives are inevitable. I think a person that is "enlightened" is really just very aware of their real, true state of mind -peace and happiness, that no emotion/or expereince is going to take that away. (doesn't mean they avoid feeling it) They find their way back much sooner.

I think sometimes we can allow these feeling to take over and make them bigger than they need to be. We can sometimes feed it and give it more momentum to grow into something bigger. So it's important to know how you prefer to feel and what your core desired feelings are so you can find your way back to them sooner.

Great topic! ;)