Galatians 6:2

Now we who are strong ought to bear the weaknesses of those without strength and not just please ourselves.

To those who are without law, as without law, though not being without the law of God but under the law of Christ, so that I might win those who are without law.

For the whole Law is fulfilled in one word, in this: “You shall love your neighbor as yourself.”

But one who looks intently at the perfect law, the law of freedom, and abides by it, not having become a forgetful hearer but a doer of the work, this man will be blessed in what he does.

For it would be better for them not to have known the way of righteousness, than having known it, to turn away from the holy commandment handed on to them.

that you should remember the words spoken beforehand by the holy prophets and the commandment of the Lord and Savior spoken by your apostles,

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.