Poem: Experience by Dorothy Livesay

"For your own good" they said,
And they gave me bread
Bitter and hard to swallow.
My head felt tired after it,
My heart felt hollow.

So I went away on my own road
Tasting all fruits, all breads:
And if some were bitter, others were sweet --
So I learned
How the heart is fed.


I honestly think this is one of the easiest poems to analyze, but I don't know why I'm having so much trouble finding out a good thesis for my essay I have to write. Any ideas of one? Any good words I could use, or any literary devices? Thanks for your time !