God gives grace from start to finish in a person's relationship with Him. It cannot be limited merely to justification and His forgiveness of our sins.
'Grace' is a term that represents God's awesome generosity toward us, His continuously flowing blessings and saving acts. It goes beyond just forgiveness.
God's grace supports and fulfills us, but it does not mean 'once saved,always saved.' It is possible to fall from grace, as Israel's experience demonstrates.
Grace implies empowerment for growth. It is the single most important aspect of our salvation, and His giving of it is completely unmerited on our part.
God's calling us is just our initial taste of His grace. Grace is unmerited, but it is not unconditional. We have an obligation to respond to God.
Forgiveness is only the beginning of the grace process, enabling us to grow to the stature of Christ. Paradoxically, grace puts us under obligation to obey.