For what purpose did Christ say He would come again?

Answer

"I go to prepare a place for you. And if I go and prepare a place for you, I will come again, and receive you
unto Myself; that where I am, there you may be also." John 14: 2, 3.

What writings are specifically mentioned as containing some things difficult to understand?
What would make the death of Christ in vain?
Just before the fall of Babylon, what did her king do?
And what is indicated as the lawful use of the law?
What does God say the Sabbath will be to those who hallow it, or keep it holy?
When, according to the Bible, does the Sabbath begin?
How was Christ strengthened after His forty days' fast and temptation in the wilderness?

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