God's requirements have been satisfied. It is in justification that we find the guarantee of our sanctification. With justification, God declares His purpose to sanctify. In each passage there is an unbroken relationship between justification and sanctification. Sanctification, having been set apart unto God, is not simply an option available to the believer.
Sanctification is a guaranteed result of our justification.
This is God's purpose for us. It is not built upon a foundation of our resolve, but upon the stated purpose of almighty God. God's purposes are unfailing. Although the entire inheritance of the riches of His grace is bestowed when one is justified, many live like paupers because of their unbelief. This veils the inward change.