Even people who claim to walk under the new covenant & its grace still point to old covenant commands as the most important things in life.
The Greatest Old Covenant Commands (Luke 10:27):
Love the Lord your God with all your heart, all your soul, all your strength, & all your mind.
Love your neighbor as yourself.
The Only Universal New Covenant Command (1 John 3:23, John 13:34-35, 14:1):
Trust in God. Trust in Jesus. Love one another as God has loved us.
The old covenant is by the letter of the law. The new covenant is by the spirit.
The old covenant is external. The new covenant is internal leading to external.
Under the old covenant everything must be up to you. Under the new covenant everything is freely done WITH God.
Old covenant: Love.
New covenant: Be loved & love together.
This is where all religions fall short, including Judaism & atheism. They all tell you to love but none of them let you be loved first. They all leave you unloved & alone. But Jesus' message was, "You have a Father who loves you & wants to know you."
Love God?If you love Me, you will keep My commandments † I Will Love You So You Will Trust Me