When we eat, our bodies break down the food and get from it both energy and materials for building and repairing the body. The process is similar on a symbolic level in the Bible. Food represents the desire for good and the insight that comes from that desire for good – goodness and understanding that come from the Lord. But to put them to use we have to take them in and make them our own – which is spiritual eating.

562. The people before the Flood were such that at length they possessed practically no remnants at all, the reason being that they were now of such a disposition that they became steeped in dreadful and abominable persuasions regarding everything that suggested itself to them or entered into their thinking. Consequently they had no wish at all to retreat from such persuasions. And indeed they were possessed so very greatly by self-love as to imagine that they themselves were like gods and that everything they thought was divine. Nowhere else has such persuasion arisen with any set of people before or since that time, for it is deadly or stifling. For this reason in the next life these people cannot possibly be where other spirits are, for when they are present, they deprive other spirits, by flowing in with their own most stubborn persuasions, of all ability to think. These along with other matters will in the Lord's Divine mercy be dealt with later on.