Old Testament: You must love God with all your heart, all your soul and all your strength.-Deuteronomy 6:5
Genesis 17:17-Abraham said in his heart, "Will a man 100 years old have a child born to him, and will Sarah, a woman 90 years old give birth?" - This definitely sounds like inner dialog and would be a product of the mind.
The heart and the mind are the same per the old testament.
Jesus then says it a different way. -Matthew 22:37
New Testament: You must love God with your whole heart, with your whole soul and with your whole mind.
Why the need to toss out the word "strength" when heart and mind are already covered with one word?
Is the God of the Mosaic Law and Jesus not on the same page?