Hello, I am still trying to get the hang of this message board stuff, but here goes. I could not find the notes mentioned, but I will give the answer a try.
The basic idea of being a slave means that I am not in control, but am controled. References to slave in the New Testament often refer to my being a slave to sin before becoming a child of God. And as I grow it is getting easier to see the "terms of enslavement" that used to bind me.
The root idea of saint - I don't know the specifics of this answer, but I do know that being God's child means I am more than a slave who has no control or power over the self. Being in complete submission to God means that He owns me (purchased with Jesus' blood) and that I still do not have control; only the choice to submit.
Being a saint, a child in complete submission to my heavenly Father is like being a slave, though not for unrewarded service; rather being rewarded with the privilege and love of my Abba.
Whether slave or saint, I would rather be Christ's slave, than a freedperson without God.
God Bless all of you.