I am Christian Orthodox, but I was asked on YouTube to explain God, Satan, Sin, Hell and Fate to a Atheist in a logical, rational way without using religion as my point. So this is how I explained it to him. I hope he understood it well.
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What is FATE
You see fate is like climbing a tree.
The tree is there and you can never change it. But you can chose what branch to climb (fate) or if you want to cut it off (do suicide). Some of us climb a sick branch and die young in some health problem. Others are born in a sick tree that will sooner or later fall (he/she dies) together with him. Those who reach the top of the tree, try to climb back down, but in fate you can not go back down in time. So you can never climb back down the tree. There for you end up suspended till the branch breaks and you die of old age.
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God made that tree of fate. You can chose your fate, but you can never make the tree grow new branches as in fate, you can never make a fate that does not already exist to be chosen in the first place.
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FATE and a real TREE
What differs the tree of fate from a real tree is that in the tree of fate the branches can connect with each other on the path to the top, so that sometimes they reach at the same place though you took different paths in life. And the tree of fate can also as it does for many connect with other trees so that they find a partner for life.
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Fate is in our genetic linked code to the universe and the universe is God. But I will come to explaining that later.
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GOD and FATE
God give us fate for each person it is different, but he did not say what path we should take in it. We pray to God so that God enlightens our mind so we chose the right path. But it is NEVER God who chooses for us and it is ALWAYS we who chose our fate in life. ALL humans are born free even free from God, though freedom from God comes at a price. And that price is lack of Godly enlightens that leads to easier deceive by Satan. But Satan only means "the enemy" and NOT a demonic monster as Hollywood and the Catholic church depicts him.
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Who is SATAN and who is GOD
Satan is in fact beautiful, though he chooses out of hate to look bad for us. Now what is Satan? And what is God? Satan is our ego and greed. Yes Satan is part of us. God is the universe and also part of us since we all are part of the universe and part of our own ego and greed. Satan is not all knowing since we are not all knowing. But Satans knowledge spans thousands of years since our memory in our genetic code spans thousands of years.
God is all knowing cause the universe has all the knowledge in it and there for the universe all together can never be less the all knowing since nobody in the universe can know more then the universe all together knows.
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MAN and GOD and SATAN
The greed man has and his ego is "the enemy" that is Satan. Because it is the ego and greed who makes us so selfish that we destroy others peoples lives for our own including the power hunger the   a s s h o l e s   in power have to enslave the people using anything including religion as a tool for evils out of greed and ego.
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What is SIN, HELL, HEAVEN, EVOLUTION and the SOUL
Sin is what will eventually destroy our evolution even if it does not do it right now and even if it does not do it on a mass scale. Example: God dislikes gays but why? Answer is that homosexual people can not have children in a natural way unless they are bisexual. Evolution is made to grow in a natural way and we are not snails to impregnate ourselves. Evolution is the tool f God (the universe). With no evolution, there would be no universe.
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Hell is what we make. Look around us plz? All we do in life is recorded in our genetics and if we are bad people then our geens will act accordingly after we die. That is how we will be punished since if our geens act good after we die then what is left of us may also have a second chance in this universe, but if it acts bad then the second chance will be very painful in other words "a hell".
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Heaven is exactly the opposite. It is when our geens act accordingly to our actions the same way as in hell but for the good things in our life instead of bad. Making eternity a very beautiful place for our geens to exist.
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The soul is the geens left from us. It contains records of us and our past. And from those records it creates a eternity of hell or heaven and yes God is the judge and the jury since  God is the universe and it is in this universe our genetics will for eternity exist and it is the laws of physics that this universe (God) made that will decide the destinations of our genetics.
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/ By: Liviu Rafael Nichiforiuc
Date: 06-02-2015