If we accept human testimony, the testimony of God is surely greater.

1 John 5:9-12  

9

If we accept human testimony, the testimony of God is surely greater. Now the testimony of God is this, that he has testified on behalf of his Son.

10

Whoever believes in the Son of God has this testimony within himself. Whoever does not believe God has made him a liar by not believing the testimony God has given about his Son.

11

And this is the testimony: God gave us eternal life, and this life is in his Son.

12

Whoever possesses the Son has life; whoever does not possess the Son of God does not have life.