[phosphorescent]

I agree with what the others have said before me.
Especially upon the importance of good imagery, and that is indeed better conveyed through less literal portrayals and interpretations.
Remember, subtlety is the key.

For example, when you say 'Rainbows flow from her soul', try using a less cliche and more unique way of describing it.

This stanza,

'The darkness she had feared
Finding herself on a horse
The darkness arising . She just reared
Racing into the dark'

made not much sense to me. Be sure what you are trying to say before you write it in your poetry (which will further reduce the clarity of your meaning).

Anywhos, there's always room for improvement (:
Keep writing and reading.