John 3:11-13

Amplified Bible

¹¹ I assure you and most solemnly say to you, we speak only of what we [absolutely] know and testify about what we have [actually] seen [as eyewitnesses]; and [still] you [reject our evidence and] do not accept our testimony. ¹² If I told you earthly things [that is, things that happen right here on earth] and you do not believe, how will you believe and trust Me if I tell you heavenly things? ¹³ No one has gone up into heaven, but there is One who came down from heaven, the Son of Man [Himself—whose home is in heaven].