John 3:12

10 Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?

11 Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.

If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?

13 And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.

14 And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
If I have told you about earthly things and you do not believe, how will you believe if I tell you about heavenly things?
KJV
If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
WEB
If I told you earthly things and you don’t believe, how will you believe if I tell you heavenly things?
ASV
If I told you earthly things and ye believe not, how shall ye believe if I tell you heavenly things?
DARBY
If I have said the earthly things to you, and ye believe not, how, if I say the heavenly things to you, will ye believe?
BLB
If I spoke to you⁺ earthly things and you⁺ do not believe, how will you⁺ believe if I should speak to you⁺ heavenly things?
ÅB
Når jeg har sagt dere de jordiske ting, og dere ikke tror, hvordan skal dere da tro om jeg sier dere de himmelske?
OTB
Hvis jeg har talt til dere om jordiske ting og dere ikke tror, hvordan skal dere da tro når jeg taler om himmelske ting?
B1930
Når jeg har sagt eder de jordiske ting, og I ikke tror, hvorledes skal I da tro om jeg sier eder de himmelske?

Study notes (Tyndale)

Original text and word study

Cross references