Hebrews 10 - What happened that makes us be sanctified? 2018

Heb 10:14
For by one offering He has perfected for all time those who are sanctified.

By this one offering He has perfected forever those who are being brought closer to Him (sanctified). What happened that makes us be sanctified? In keeping with the theme in Hebrews 8 and 9, it is the writing of the Torah in our hearts and in our minds. This was done through the blood of Messiah.
Torah has shadows of the good things to come. The Torah, particularly the offerings, were not the very form of the sacrifice of Yeshua through which we receive the Spirit of the Father.

The sacrifices could never make the offeror or anyone for that matter, perfect. A much better sacrifice was necessary for man's salvation.