Your post is so rife with messages and meaning I can't seem to figure out which one to talk about.
So i just decided to pick the end

But you have to believe.
You have to stop picking off the leaves
and Practice Patience as you grow,
And one day when the time is right,
The true beauty will show.

Yes! Belief is one thing which is a necessity for our advancement because in belief, there is a cause, and to that cause we aspire, aspiring to the cause leads to success.
So one day, when the time is just right, the true beauty of the booming flowers of our lives would show.
Not forgetting your scholarly thought on thought...

Because our thoughts are full of power.
They dictate our whole experience.
But if we let our thoughts turn sour,
This can be extremely serious.

I have always considered thought to be where our lives start or end, where we emerge victors or simply vanquished. The happenings of our physical self i also believe are the manifestations of the thoughts we possess and the dreams we habour. The consequences you havbe outlined as a result of negative thought are clear enough.
Great poem with a great message.