There is, for everyone, a crossroads when it comes to spiritual things, a basic decision to be made. Are you going to believe in the Lord and in spiritual reality? Or are you only going to believe what you can see, touch, feel and otherwise "know" from your own mind? The Writings say those who choose the latter course are closing themselves off from the truth, because by definition spiritual reality cannot be seen, touched, felt or otherwise "known" through purely human means. That's what it means to eat "of the tree of the knowledge of good and evil," and it leads to spiritual death – which is being cut off from the goodness and truth the Lord wishes to bestow on us.

The people of the Most Ancient Church were in a state of love to the Lord, and had been invited to gather all the wisdom and knowledge flowing from that love – the fruit of all the other trees. But they had to accept the Lord as the source, had to accept that He existed, had to accept that He was infinite and beyond their finite understanding. To think otherwise – to think that through their own minds they could explain the Lord – would be to put themselves above him, and lead them into evil.

It's worth noting that this was not a call for people to shut down their minds. The fruit of the other trees represents an incredible bounty of exploration, learning and wonderment. And we're not called on to shut down our minds today; the Lord gave us our intellectual faculties for a reason. To let the Lord in, though, we have to accept the unprove-able idea that He is love itself and reality itself, and see all other knowledge in that light.

(Референци: Arcana Coelestia 126-132, 127, 128-134, 129, 0130)

215. The proprium is nothing but evil and falsity. This has been made clear to me from the fact that anything spirits at any time have spoken from themselves has been evil and false, and so much so that the moment I was made to realize that it originated in themselves I knew it was false, even though, when they spoke, they were so sure of its being the truth that they were in no doubt about it. The same is true of the person who speaks from himself. Similarly whenever people have started to reason about the things which constituted spiritual and celestial life or about those which comprised faith, I have been allowed to perceive that they doubted, indeed denied, those things; for reasoning about faith amounts to doubting and denying. And because they reason from themselves, that is, from the proprium, they plunge into utter falsities, and therefore into abysmal thick darkness, that is, thick darkness of falsities. At such times the tiniest quibble weighs more heavily than a thousand truths, just as a speck of dust deposited on the pupil of the eye prevents it from seeing the universe and everything it contains. The Lord speaks of these people in Isaiah as follows,

Woe to those who are wise in their own eyes, and in their own sight are intelligent! Isaiah 5:21

And in the same prophet,

Your wisdom and your knowledge led you astray, and you said in your heart, I am, and there is no one else besides me. And evil will come upon you, whose origin you do not know, and disaster will befall you, which you will not be able to expiate, and vastation will come upon you suddenly of which you know not. Isaiah 47:10-11.

In Jeremiah,

Every man has been made stupid by knowledge; every metal-caster is put to shame by his statue, for the idol he moulds is a lie, and there is no spirit in those things. Jeremiah 51:17.

'Statue' stands for the falsity which belongs to the proprium, and 'idol' for the evil which belongs to it.