God definitely expected the people of Yisrael to house the Words he spoke in their hearts.
Deut 30
11 Now what I am commanding you today is not too difficult for you or beyond your reach.
12 It is not up in heaven, so that you have to ask, "Who will ascend into heaven to get it and proclaim it to us so we may obey it?"
13 Nor is it beyond the sea, so that you have to ask, "Who will cross the sea to get it and proclaim it to us so we may obey it?"
14 No, the word is very near you; it is in your mouth and in your heart so you may obey it.
15 See, I set before you today life and prosperity, death and destruction.
16 For I command you today to love the LORD your God, to walk in his ways, and to keep his commands, decrees and laws; then you will live and increase, and the LORD your God will bless you in the land you are entering to possess.
Where do you get that the children of Yisrael where never able to be led and moved by the Spirit? We were created to stumble, AND to be redeemed. We are the example for you gentiles who will have the same mercy and grace poured out upon you. You who even though were not called to be God's people are given a chance to become one, even though your sins are as scarlet you will be called 'my people' IF you repent of your sins, just like us. In this way we are no different. We are all saved by faith through grace. Before and After the coming of Messiah, it all hinged on faith. If not, why did God state in the OT that 'the righteous will live by faith'? Or do you believe there were none righteous before the coming of Messiah?
I am not talking about housing His word in the people of Israel's hearts. I am talking about a specific thing that, but I am speaking specifically about the New Covenant where He has said that He will write His Word on our hearts.
Jeremiah 31:27-34
A New Covenant
27“Behold, days are coming,” declares the LORD, “when I will sow the house of Israel and the house of Judah with the seed of man and with the seed of beast.
28“As I have watched over them to pluck up, to break down, to overthrow, to destroy and to bring disaster, so I will watch over them to build and to plant,” declares the LORD.
29“In those days they will not say again,
‘The fathers have eaten sour grapes,
And the children’s teeth are set on edge.’
30“But everyone will die for his own iniquity; each man who eats the sour grapes, his teeth will be set on edge.
31“Behold, days are coming,” declares the LORD, “
when I will make a new covenant with the house of Israel and with the house of Judah,
32 not like the covenant which I made with their fathers in the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them,” declares the LORD.
33 “
But this is the covenant which I will make with the house of Israel after those days,” declares the LORD,
“I will put My law within them and on their heart I will write it; and I will be their God, and they shall be My people.
34“They will not teach again, each man his neighbor and each man his brother, saying, ‘Know the LORD,’ for they will all know Me, from the least of them to the greatest of them,” declares the LORD, “for I will forgive their iniquity, and their sin I will remember no more.”
Writing His Word on our hearts is one of the premises of the New Covenant.