'Herb bearing seed,' as mentioned in Genesis 1:29, signifies truth in terms of its use. (Arcana Coelestia 57) Every herb in the Bible signifies some type of knowledge.

'Green herbs,' as mentioned in Genesis 1:30, mean food for the natural man.

'Eating the herb of the field,' as mentioned in Genesis 3:18, signifies that a person should live as a beast.

'Herb of the field' signifies spiritual truth.

(Reference: Arcana Coelestia 7626)

7626. All this too may be used to form an idea of what a member of the Church is like when his faith is combined with charity - he is like a garden, like a park. But when faith is not combined with charity, he is like a solitary waste, like land covered with snow.