The Bible often speaks of signs and miracles as things that convinced people of the Lord's leading. "Signs" convince people to believe intellectually, and "miracles" convince people to believe emotionally. For instance, it was a "sign" for the shepherds that they would find the newborn Jesus wrapped in swaddling clothes, lying in a manger. This was not something that defied explanation; there is nothing impossible about a baby being laid in a manger. On the other hand miracles such as the Nile turning into blood, the Red Sea parting or water being made wine were apparently impossible, striking awe and fear in the hearts of observers and thus compelling the emotions. Both signs and miracles, however, are external events that could only force people into compliance out of fear and awe, which is an external form of worship that has little to do with eternal life. The Lord used them in Biblical times because the people of that time were external in nature, and the Lord had to force them into forms of worship to preserve spiritual ideas and to allow for the Bible to be written. Through His advent and His teachings He opened the possibility that we could understand His spiritual meanings, which would allow us to believe and live internally, not just externally.

56. Verse 29 And God said, Behold, I give you every plant yielding seed which is upon the face ¹ of the whole earth, and every tree in which there is fruit, the tree producing seed will be for you for food. A celestial man takes delight in none but celestial things, and because these suit his life they are called celestial food. A spiritual man takes delight in spiritual things, and because they suit his life they are called spiritual food. The same applies to a natural man and natural things, and because they suit his life they too are called food, and are chiefly facts. Here, since the subject is the spiritual man, his spiritual food is described by representatives, that is to say, spiritual food is represented by 'the plant yielding seed' and by 'the tree in which there is fruit', which in general are called 'the tree producing seed'. His natural food is described in the next verse.

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