My interpretation... is that it is someone almost arguing with their own thoughts...
Seven times have I despised my soul:
The first time when I saw her being meek that she might attain height.
I despised my inner self for being afraid when I could have been more bold and achieved more than I would have.
The second time when I saw her limping before the crippled.
I despised my inner self for not trying as hard as I could have when people with less than me did more.
The third time when she was given to choose between the hard and the easy, and she chose the easy.
I despised my inner self for choosing the easier options.
The fourth time when she committed a wrong, and comforted herself that others also commit wrong.
I despised my inner self when I believed the wrongs I have done are not that bad because others have also committed them.
The fifth time when she forbore for weakness, and attributed her patience to strength.
I despised my inner self for telling myself I waited as a virtue when, what I really wanted to do was act.
The sixth time when she despised the ugliness of a face, and knew not that it was one of her own masks.
I despised my inner self for viewing others as ugly even though we are all human and that it could just as easily be me.
And the seventh time when she sang a song of praise, and deemed it a virtue.
I despised my inner self for telling me that I am such a great person, despite how much I despise my inner self.
Nice poem by the way first time I've read it, I really like it.