golfeggs
If satan didn't exist, it wouldn't be called Earth, it would be called Heaven. Earth is a place where we come to learn and grow spiritually. You wouldn't learn as much if you had everything given to you would you? Look at Paris and her buddies. God created a universe where anything is possible. Anything includes a "satan".
The greatest affliction is never to have been afflicted. We learn wisdom by experiencing tribulation.
Sometimes your most disappointing disappointments have become your greatest blessings. Sometimes the planting of a seed necessitates its death, the death of your fondest hopes, before it can be reborn to bear the fruits of new life and new opportunity.
Is courage -- strength of character -- desirable? Then man must be reared in an environment which necessitates grappling with hardships and reacting to disappointments.
Is hope -- the grandeur of trust -- desirable? Then human existence must constantly be confronted with insecurities and recurrent uncertainties.
Is faith -- the supreme assertion of human thought -- desirable? Then the mind of man must find itself in that troublesome predicament where it ever knows less than it can believe.
Is the love of truth and the willingness to go wherever it leads, desirable? Then must man grow up in a world where error is present and falsehood always possible.
Is loyalty -- devotion to highest duty -- desirable? Then man must carry on amid the possibilities of betrayal and desertion.
And worshipping Jesus isn't a requirement. It's not even the act of worship that "saves". God answers the soul's attitude, not the words or the act. So a your time frame doesn't affect anything. There have always been Gods, and each God is only one or a few attributes of God, and each religion is one way to know God and/or yourself. So pick the one that fits and run with it. If you choose not to pick one, you will still meet God, so it's not if you come to know God, it's where. God leaves it up to you.