'Here I Am' in the Bible

You'll look for me but won't find me. And where I am, you cannot come."

What does this statement mean that he said, "You'll look for me but won't find me,' and, "Where I am, you cannot come'?"

If anyone serves me, he must follow me. And where I am, there my servant will also be. If anyone serves me, the Father will honor him."

And since I'm going away to prepare a place for you, I'll come back again and welcome you into my presence, so that you may be where I am.

You know where I am going, and you know the way."

Father, I want those you have given me to be with me where I am and to see my glory, which you gave me because you loved me before the creation of the world.