Ki ein banu ma'asim ... We have no good deeds ...
We stand in front of God, our Parent, our King, and we acknowledge all the things we did wrong. We ask for grace, compassion, kindness even though we have no good deeds to recommend us. We aren't worthy of God's love, compassion, grace.
I know - it's a metaphor.
Most of us have felt that way, recognizing the demons that will just NOT SHUT UP in the middle of the night, believing that have nothing valuable to offer. We don't deserve God's compassion, we'll never get it, we will be failures forever.
Even then, we act ... as if.
We do the next right thing as if we knew what we were actually doing.
We get dressed in the morning, brush our teeth at night, acting as if we were God's children.
And eventually, most of the time, our "act as if" act becomes reality, and we realize that we are loved, we are worthy, we deserve God's compassion always because we are children of God.