What does the Bible say about men going to school to be a preacher?

My husband and I have been going through one trial right after another. How do you know why you are going through the trial and what can you do to be strong during the trial?

Did the 144,000 get resurrected and if so when? Is this the same group mentioned in Revelation 7?

What does the Bible mean when it says that we are to eat the flesh and drink the blood of Jesus Christ?

Does Luke 9:62 describe backsliders as though they were never saved?

Why did Jesus tell Mary not to touch Him since he had not ascended? When did he ascend? Did not he invite Thomas to thrust his hand in his side? Also when did Jesus present the blood to the Father? Was it the literal blood that came from his body on the cross?

In Psalm 40:6 we read "mine ears hast thou opened", but when it was quoted in Hebrews 10:5 it says "a body thou hast prepared me". Why was it quoted differently?

Do those in Heaven see us and know what is going on in the Earth? Are those in Hebrews chapter 11 watching on and so we are to do our best for their sakes?

What does the Bible say about premarital relations? Also, does the Bible say anything about whether God will send someone to you or not?

I have some friends who are not married but they are living together, can you help me show them where they are wrong according to the Bible?