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.

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

Time is an aspect of the physical world, but it is not an aspect of the spiritual world. The same is true of space: There is no space in heaven. This is hard for us to grasp or even visualize, because we live in physical bodies with physical senses that are filled with physical elements existing in time and space. Our minds are schooled and patterned in terms of time and space, and have no reference point to imagine a reality without them. Consider how you think for a second. In your mind you can immediately be in your past or in some speculative future; in your mind you can circle the globe seeing other lands and faraway friends, or even zoom instantly to the most distant stars. Such imaginings are insubstantial, of course, but if we could make them real we would be getting close to what spiritual reality is like. Indeed, the mind is like a spiritual organ, which may be why physicians and philosophers have had such a hard time juxtaposing its functions to those of the brain. What this means in the Bible is that descriptions of time -- hours, days, weeks, months, years and even simply the word "time" itself -- represent spiritual states, and the passing of time represents the change of spiritual states. Again, we can see this a little bit within our minds. If we imagine talking to one friend then talking to another, it feels like going from one place to another, even though we're not moving. The same is true if we picture a moment from childhood and then imagine something in the future; it feels like a movement through time even though it's instantaneous. Changing our state of mind feels like a physical change in space and time. The Bible simply reverses that, with marking points in space and time representing particular states of mind.