Jesus said to the Pharisees:

‘I am going away;
you will look for me
and you will die in your sin.
Where I am going, you cannot come.’

The Jews said to one another, ‘Will he kill himself? Is that what he means by saying, “Where I am going, you cannot come”?’ Jesus went on:

‘You are from below; I am from above.
You are of this world; I am not of this world.
I have told you already:
You will die in your sins.
Yes, if you do not believe that I am He,
you will die in your sins.’

So they said to him, ‘Who are you?’ Jesus answered:

‘What I have told you from the outset.
About you I have much to say
and much to condemn;
but the one who sent me is truthful,
and what I have learnt from him
I declare to the world.’

They failed to understand that he was talking to them about the Father. So Jesus said:

‘When you have lifted up the Son of Man,
then you will know that I am He
and that I do nothing of myself:
what the Father has taught me is what I preach;
he who sent me is with me,
and has not left me to myself,
for I always do what pleases him.’

As he was saying this, many came to believe in him.