Everything one sees, hears, or perceives through any sense or experience has a distinct and definite effect upon one's soul, upon one's spirit. What one eats, what one drinks, what one sees, what one touches, the atmosphere in which one lives, the circumstances one faces, the conditions one goes through, all these have a certain effect upon one's spirit. Whether a person eats grosser food or finer and purer food is manifested outwardly; even if one does not heed it, it is manifested outwardly. The body shows the nature it has inherited from the earth to which it belongs; for the nature of this earth is such that when it receives the seed of a flowering plant it produces flowers, and when the seed of a fruit-tree, it produces fruits. And when it receives the seed of poison it produces poison.