Yochanan 14:16-17

And I will ask HaAv and another Melitz Yosher He will give you that He may be with you l'Olam, The Ruach HaEmes, which the Olam Hazeh is not able to receive, because it does not see Him nor have da'as of Him. But you have da'as of Him, because He remains with you and He will be in you.