Answer:
I'm the source of all emotion but I'm caged in a white prison.
I'll bring out your bulls and slow your roll. I may even come out of your skull.
Without a bridle or a saddle across a thing I ride a-straddle. And those I ride by help of me though almost blind are made to see.
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I am a fruit with seed on the outside. What am I?
I have feet on my head