The Bible teaches us how and why God's permission of evil all began. Beyond that the Bible teaches us there is hope: "The angel said to them, Fear not, for behold, I bring you good tidings of great joy which shall be to ALL people." Luke 2:10 God's plan of recovery is based on His son, Jesus: "For as in Adam ALL die, even so in Christ will ALL be made alive.” 1Corinthians 15:22
The final outcome will be wonderful: "God will wipe away ALL tears from their eyes and there will be no more death, neither sorrow, nor crying, neither will there be any more pain: for the former things have passed away." Revelation 21:2
Here is an excerpt from a Christian Questions program which asked and answered your question. If you'd like to hear more: http://www.christianquestions.com/699-where-is-god-when-tragedy-strikes-the-innocent/
A good parent will offer their children choices, will tell them they should be obedient, and will put consequences in place. God offered the choice of obedience, along with the consequences of disobedience:
Genesis 2:16-17 (YLT), “And Jehovah God layeth a charge on the man, saying, Of every tree of the garden eating thou dost eat; and of the tree of knowledge of good and evil, thou dost not eat of it, for in the day of thine eating of it—dying thou dost die.”
‘Dying thou dost die’, meaning "the process of dying begins." This was a test to see how well Adam would obey. The test of obedience was presented in the form of a test of true loyalty:
Genesis 3:4-6 (NASB), “The serpent said to the woman, You surely will not die! For God knows that in the day you eat from it your eyes will be opened, and you will be like God, knowing good and evil. When the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was desirable to make one wise, she took from its fruit and ate; and she gave also to her husband with her, and he ate.”
It becomes a test not just of obedience, but also of loyalty. Satan gave them a different perspective by telling a partial truth. Were they going to trust and believe in the one who put them in the garden, or were they going to trust and believe Satan?
When we have a traumatic experience of grief, we have a choice of what to do with it. We can go back to those things which were originally most important to us and hang on to them, or let it destroy us.
Mankind went down the path of grief because of disloyalty to God. But yet we suffer because of what Adam and Eve did. Why was this allowed to be a part of our lives? If God didn't keep His word and implement the promised consequences, we wouldn't be able to trust Him!