Genesis 1:26-27 AMP Then God said, “Let Us (Father, Son, Holy Spirit) make man in Our image, according to Our likeness [not physical, but a spiritual personality and moral likeness]; and let them have complete authority over the fish of the sea, the birds of the air, the cattle, and over the entire earth, and over everything that creeps and crawls on the earth.” So God created man in His own image, in the image and likeness of God He created him; male and female He created them.
Deuteronomy 30:20 and that you may love the LORD your God, obey Him, and hold fast to Him. For He is your life, and He will prolong your life in the land that the LORD swore to give to your fathers, to Abraham, Isaac, and Jacob.”
Exodus 34:14 NLT You must worship no other gods, for the LORD, whose very name is Jealous, is a God who is jealous about His relationship with you.
John 14:6-7 6Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through Me. 7If you had known Me, you would know My Father as well. From now on you do know Him and have seen Him.”
John 14:18-21 18I will not leave you as orphans; I will come to you. 19In a little while the world will see Me no more, but you will see Me. Because I live, you also will live. 20On that day you will know that I am in My Father, and you are in Me, and I am in you. 21Whoever has My commandments and keeps them is the one who loves Me. The one who loves Me will be loved by My Father, and I will love him and reveal Myself to him.”
John 15:9-11 9As the Father has loved Me, so have I loved you. Remain in My love. 10If you keep My commandments, you will remain in My love, just as I have kept My Father’s commandments and remain in His love. 11I have told you these things so that My joy may be in you and your joy may be complete.
Christianity first is about loving God our Father which starts by receiving His love then reciprocating through the relationship which Jesus restored and the Spirit retains.
When this most essential relationship is established, it enables us to better and more fully love others as Jesus commands in John 15:12 12This is My commandment, that you love one another as I have loved you.
The cross of Christ signifies this these two essential relationships more than anything: Vertical first between the Creator and you. Then the horizontal between each other.
For the next verse Jesus lays it out like this John 15:13 Greater love has no one than this, that he lay down his life for his friends.