[Larry_OHF]

Satan indeed rebelled against God's idea of happiness.
Now, he knows he is a goner, because in the Book of Revelations, it says that he is going to be bound for 1,000 years, be let loose for a little season, then a big ending battle will take place and the bad boy is outta here forever. Well, something like that, anyway.

Yet, he does not want God to have to upper hand. He feels that if he is going down, he is going to take as many of us with him as possible. By hurting us and tempting us to do wrong, Satan can smirk at God and say, "Well, at least I destroyed some of your children!" He cannot get them all, but think about if you had 10 children...and 1 got hit by a car and died. You're still going to cry, even though you have 9 healthy kids.

Now, you say..."Why does God allow Satan to screw up our lives???"

We have free agency. That is the ability to decide what is right and what is wrong for ourselves. If we choose to let Satan get a grasp...then he can quickly take over our future and ruin our lives...with eternal consequence.
If we choose the right way, then we continue to remain free and progress towards salvation and eternal life.

God does not want Satan to hurt us...but we have to be tried and tested. If we exceed, we become stronger. In Genesis, Eve says that it is better to pass through sorrow that we might know joy.[i](not the exact quote). If you leave your child alone in the kitchen with the cookie jar, and tell him..."Do not eat the cookies, until I return," and the kid was obedient to your word...so that when you returned he ad not touched the cookies, you would know that you had an obedient kid, and you could trust him. Thus God knows who he can "trust", by our way of deciding if we wanna follow Him, or Satan. Following Satan or allowing Satan to whisper sweet nothings into our ear proves to God that we are not worthy to be in His presence, and reluctanly, He must allow Satan his victory, because we were not forced to do it Satan's way...we elected to. If your kid decides to become a drug addict, and after all you do to help him understand the foolishness of his way, he still does it his way, and even laughs at you, curses you for being there, and runs away from you...what more can you do? The boy is a legal adult at 18.(US standard). So, you see, God cannot force us to do it the right way, without taking away our agency...which is our right to choose how we will live. God will not force us to do it His way, though He really wishes that we would listen to His still, small voice...(Reference to the Holy Ghost).