When Jesus (Yeshua) came, he joined the old and the new, meaning he fulfilled the Old Testament then gave us the (all inclusive) New Testament to live by.
Now, there are universal guidelines laid out for mankind in The Book of Deuteronomy that we should continuously revisit, because the blessings and curses are still in operation today. But it’s the Two-plus-Ten Commandments for us to memorize as a testament that "I have hidden thy word in my heart that I may not sin against thee."
The two commandments Jesus, himself, placed above the ten are "You shall love the Lord your God with all your heart, and with all your soul, and with all your mind," and "You shall love your neighbor as you love yourself."
Now, there are universal guidelines laid out for mankind in The Book of Deuteronomy that we should continuously revisit, because the blessings and curses are still in operation today. But it’s the Two-plus-Ten Commandments for us to memorize as a testament that "I have hidden thy word in my heart that I may not sin against thee."
The two commandments Jesus, himself, placed above the ten are "You shall love the Lord your God with all your heart, and with all your soul, and with all your mind," and "You shall love your neighbor as you love yourself."