Hi Beth!
The pace of this, your vocal, the cello - all reinforces the notion of self-acceptance, and that whisper - the still small voice/ conscience/encouragement also complements the lyrical theme.

One idea if you wanted to create a variation in texture - in one section, maybe towards the end - replace the cello with your vocal (doubled) singing the same melody as the cello. They say the cello is the closest instrument to the human voice, and replacing it would further affirm ‘know yourself’. Just an idea.

Andrew D