Galatians 5:14

‘You shall not take vengeance, and you shall not keep your anger against the sons of your people, but you shall love your neighbor as yourself; I am Yahweh.

“Therefore, in all things, whatever you want people to do for you, so do for them, for this is the Law and the Prophets.

“And the second is like it, ‘You shall love your neighbor as yourself.’

“A new commandment I give to you, that you love one another, even as I have loved you, that you also love one another.

Owe nothing to anyone except to love one another; for he who loves his neighbor has fulfilled the law.

Love does not work evil against a neighbor; therefore love is the fulfillment of the Law.

I marvel that you are so quickly deserting Him who called you by the grace of Christ for a different gospel,

The one who believes in the Son of God has this witness in himself. The one who does not believe God has made Him a liar, because he has not believed in the witness which God has borne witness about His Son.