John 14:27-29

27Peace I leave with you, my peace I give to you: not as the world giveth, give I to you. Let not your heart be troubled, neither let it be afraid.

28Ye have heard that I said to you, I go away, and come again to you. If ye loved me, ye would rejoice, because I said, I go to the Father: for my Father is greater than I. 29And now I have told you before it cometh to pass, that, when it hath come to pass, ye may believe.