Do we forget how Holy the Blood is ?

Read Hebrews Chapter 10 in my daily devotion this morning. Wow. God talks about how the old testament sacrifices were only a picture of what was to come and how that they could not and did not remove sin. God was not satisfied with those sacrifices. So he sent his Son to fulfill that which the sacrifices of animals could not. How can we forget how Holy that Blood is, the Blood of Jesus Christ, that has cleansed and sanctified us ? So many people live today saying they are a Christian but are living in sin. They have forgotten that "It is a fearful thing to fall into the hands of the living God"! (Heb 10:31). Sadly how many of us that try to live are lives according to God's word forget that same thing so many times.