I can agree with this as a shorthand way of putting it. And it doesn't mean we save ourselves by ourselves, or that we don't have choices.
Yes we have choices. I can choose to sin if I so desire, God lets me if I want to. However, prayer, such as the example given us in the Lord’s Prayer, which we use as a guide, not a chant, strenghthens us to not sin, and then God’s will is done. Which is what we ask and what we know is better for us. If left to our own devices we are unruly children for the most part.