Nothing in your quote invalidates or can invalidate The Masters words from Matthew. Read Jeremiah 31to 33. The New Covenant is the Torah written on the heart. To believe on Yeshua is to follow him and walk as he walked, in all the beauty of the Torah: thats His Torah.
Well; this is all quite vague.
1 At that time, declares the Lord, I will be the God of all the families of Israel, and they will be my people.
33 33This is the covenant I will make with the people of Israel
after that time, declares the Lord.
I will put my law in their minds
and write it on their hearts.
I will be their God,
and they will be my people.