To love God (which is His greatest commandment) is shown to Him when we obey His commandments.
1 John 5 1-3 Whoever believes that Jesus is the Christ is born of God, and everyone who loves Him who begot also loves him who is begotten of Him. 2 By this we know that we love the children of God,
when we love God and keep His commandments. 3 For this is the love of God, that we keep His commandments. And His commandments are not burdensome.
God gives us the Holy Spirit to help
keep His commandments not change them.
John 14:15-18
15 “If you love Me, keep My commandments. 16 And I will pray the Father, and He will give you another Helper, that He may abide with you forever— 17 the Spirit of truth, whom the world cannot receive, because it neither sees Him nor knows Him; but you know Him, for He dwells with you and will be in you. 18 I will not leave you orphans; I will come to you.
Before the crucifixion Jesus said
John 14:15 “If you love Me, keep My commandments."
God says He is unchanging
Hebrews 13:8 Jesus Christ
is the same yesterday, today, and forever.
Therefore His commandments written by the finger of God on stone cannot be changed.
He even gives us this warning for changing anything in the Bible:
A Warning
Revelations 22:18,19
18 For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book; 19 and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and
from the things which are written in this book.