By what other title is the Comforter designated?

Answer

"But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth,
which proceedeth from the Father, He shall testify of Me." John 15: 26.

In what event was this prophecy fulfilled?
What record answers to this prophecy?
What is the mark of a true friend?
How important is the trial of our faith?
Does Jesus sympathize with us in our afflictions?
How perfect would God have us become?
What reward awaits the true child of God?

Questions & Answers are from the book Bible Readings for the Home Circle