When Eve and Adam ate the tree of knowledge of good and evil, paradise was sealed, along wth the tree of life. The topic of this discussion is an artifact of this decision by Adam and Eve to subjectively label everything using good and evil value judgments. The topic is about knowledge and good and evil, being used to infer and create a separation between God, paradise, and other humans.
Satan was in the tree of knowledge of good and evil. When you choose knowledge of good and evil or law as the basis for judgment, you choose the way of Satan over God. God said not to eat of this tree. If you wish to know God, you cannot make these judgements, but rather need to accept based on faith.
Let me give you a practical example of this contrast. If you were in the wild and saw a pack of wolves kill and eat a deer, this is not judged as good or evil. It would be considered, morally neutral, since it is connected to natural law and instinct. This is how things have evolved. This is the tree of life, since it defines life as it is and not how we judge it to be.
On the other hand, if you eat of the tree of knowledge; make willful moral value judgments of everything, this natural act of the wolf may no longer be seen as natural to you. Rather it is now judged based on a human value judgment. This value judgement could means that you now feel the need to enforce your value, by punishing the wolves, for killing and eating. You have become like a little god. as Satan promised. This dynamics is projected into the God of the old Testament, since it was the way humans behaved and acted but not fully conscious; becomes projected.
The tree of life was sealed, less humans tried to impose their subjective value judgments onto nature, and create a mutant natural environment, that will nevertheless evolve via artificial selection. You shall surely die, means these subjective values will throw off the natural balance of nature, even though it may appear to satisfy human subjectivity. In the end, it will cause death in nature. Too many deer will cause disease and death that was worse than the portion of the wolves.
When Adam and Eve were in paradise, before they chose the power to judge right and wrong or good and evil, they acted on impulse, in natural ways, that were integrated with perpetual creation; natural human nature. There was no right or wrong, because all impulse was natural. Afterwards they; humans, attempted to value judge reality, causing creation to become repressed and perverted.
Jesus taught the forgiveness of sins. This weakened the impact of law and Satan since it watered down the enforcements aspect law. Sin is not fully acknowledged, if there is no punishment. If you broke the speed limit and the officer let you go, there is no sin, since you were only given a warning without punishment. The idea was to return to natural impulse, where you do not make subjective value judgments. Rather learn to act on faith, like the animal; inner spirit. This allows the tree of life to become restored; natural human instinct.