Yochanan 16:7-8

But I tell HaEmes (the truth), it is better for you that I go away. For if I do not go away, the Melitz Yosher (Praklit, Advocate, Counselor, Helper in Court) will not come to you. But if go, I will send Him (the Ruach Hakodesh) to you. And having come, that one will expose and convict the Olam Hazeh concerning Chet and concerning Tzedek and concerning Mishpat