The Bible covers the entirety of the human existence, from beginning to end. Therefore, we as believers, equipped with the assistance of the Holy Spirit, should be able to determine where we are in the Bible. Who our forefathers were. If America is in the Bible. If the Antichrist is here or not. What church has the truth, etc. Now, I'm not going to say I got all the answers just by studying, because prayer, and actual legit fasting is a huge, often neglected piece of the puzzle. True fasting, by the way, means you eat NOTHING for a period of time. I've found that for me it takes about a week to change my mental state. (Don't take my word for it, try it). Now, i can already hear some people saying that this is occult or something, and that fasting is "just to show God that you can give something up for him". So lets put this in perspective. 
Here the Messiah is plainly saying that while he was there in the flesh, his disciples didn't need to morn and fast, otherwise known as "afflicting the soul" , because He was available to talk to them in person. Now notice He says that AFTER HE LEAVES there would be the need for this. We can all agree that we are in the time after He left. And if you fast for a week or more, your mental state WILL change. Your body was created that way.
I can also say that I found Zero answers to these things all my years in various churches. (I was both in the military, and a military brat so I've been to more then a few)
So, I'll start with Churches. By all means, if anyone is offended or has a rebuttal, feel free to discuss it. I'll never get mad and walk away from a debate. I'll finish this post with two quotes that I will go much deeper into later.
"It was the Catholic Church which, by the authority of Jesus Christ, has transferred this rest to the Sunday in remembrance of the resurrection of our Lord. Thus the observance of Sunday by the Protestants is an homage they pay, in spite of themselves, to the authority of the (Catholic) Church."
---Mgr.Sfgur,"Plain talk About the Protestantism of Today,"p.213
" But the Protestant mind does not seem to realize that in accepting the Bible [Catholic version], in observing the Sunday, in keeping Christmas and Easter, they are accepting the authority of the spokesman for the Church, the Pope."
---Our Sunday Visitor,Feb.5,1950
I like where you're going with this. The apathy of many people toward the law is pretty mind numbing. It didn't change.
I read an interesting article yesterday that a recent study proves fasting is actually very good for us. This study shown a 3 day fast could regenerate the whole imune system and was being used to of set chemotheropy treatments. Good post. I believe the Sunday worship holds pagon origons.