Imagine the scene if you can. You have spent your time enduring the hardships of a slave. In fact you have faced generational slavery that has gotten progressively more inhuman. Having to work under hard conditions with cruel taskmasters. Being forced to kill your young. Working without the necessary tools to do the job most effectively (even though they are available).
Everything about this existence is gloomy. Then someone outside of you steps into eradicate your situation. With a mighty hand he shows his power. He makes it clear to your oppressors that releasing you was in their best interest.