You are right. We can do nothing without grace and we are nothing without Christ.
God’s purpose for the elect is beautifully stated in Romans 8:29. This verse tells us that the Father’s purpose is that we are to “be conformed to the image of his Son.”
Paul also says that “whatever does not proceed from faith is sin.”[Romans 14:23]
What should be proceeding from faith is life in the Spirit. We are to be lead by the Spirit and we are to be dead to sin. God’s grace is not inert. God’s grace gives us power and strength.
Isaiah 55:10-11 expresses this very well in saying,
“For as the rain and the snow come down from heaven, and return not thither but water the earth, making it bring forth and sprout, giving seed to the sower and bread to the eater, so shall my word be that goes forth from my mouth; it shall not return to me empty, but it shall accomplish that which I purpose, and prosper in the thing for which I sent it.”
There are also numerous verses in the NT that speak of the power associated with grace and how it accomplishes God’s purpose within us. A great example of this is found in Phillipians 2:12-13 which says:
"Therefore, my beloved, as you have always obeyed, so now, not only as in my presence but much more in my absence, work out your own salvation with fear and trembling; for God is at work in you, both to will and to work for his good pleasure.
Galatians 6:15 says, “For neither circumcision counts for anything, nor uncircumcision, but a new creation.”
It’s all about being filled with the Spirit, putting on Christ, being conformed to Christ, and being a new creation in Christ Jesus. Salvation is an awesome and glorious work of God.