John 6:63

61 When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?

62 What and if ye shall see the Son of man ascend up where he was before?

It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.

64 But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.

65 And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.

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

Compare

BSB
The Spirit gives life; the flesh profits nothing. The words I have spoken to you are spirit and they are life.
KJV
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
WEB
It is the spirit who gives life. The flesh profits nothing. The words that I speak to you are spirit, and are life.
ASV
It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, are are life.
DARBY
It is the Spirit which quickens, the flesh profits nothing: the words which I have spoken unto you are spirit and are life.
BLB
It is the Spirit making alive; the flesh profits nothing. The words that I have spoken to you⁺ are spirit and they are life.
ÅB
Det er Ånden som gjør levende, kjødet gagner intet; de ord som jeg har talt til dere, er ånd og er liv.
OTB
Ånden gir liv; kjødet teller ingenting. De ord jeg har talt til dere er ånd og liv.
B1930
Det er Ånden som gjør levende, kjødet gagner intet; de ord som jeg har talt til eder, er ånd og er liv.

Study notes (Tyndale)

Original text and word study

Cross references