By faith, we look to Calvary Cross for justification but we look to the Holy Spirit for our sanctification because He helps us to apply God's Word to our lives (Romans 15:14–21).
Sanctification does not come by simply contemplating upon the Cross and the moment of our justification. It comes by the power of the Holy Spirit operating in our lives. For example, you have been taking (stealing) things from the office and when you are saved, you stop stealing from your boss. That's called sanctification. You have been sleeping with your boyfriend, but now you stop because of the conviction of the Holy Spirit. That is called sanctification. You have been cursing and swearing but now you stop... that is sanctification.
Jesus has sent the Holy Spirit to sanctify us so that we can experience holiness in our lives. Therefore, being empowered by the Holy Spirit, we are being transformed daily to become more and more like Christ. AK